diff --git a/src/main/java/cactusServer/entities/Bullet.java b/src/main/java/cactusServer/entities/Bullet.java
new file mode 100644
index 0000000..c81b447
--- /dev/null
+++ b/src/main/java/cactusServer/entities/Bullet.java
@@ -0,0 +1,49 @@
+package cactusServer.entities;
+
+import org.ntlab.radishforandroidstudio.framework.model3D.Position3D;
+import org.ntlab.radishforandroidstudio.framework.model3D.Quaternion3D;
+
+public class Bullet extends Entity3D {
+	private String playerID;
+	private Position3D position;
+	private Quaternion3D angle;
+
+	private Bullet() {
+		// JSON�G���R�[�h���̌Ăяo���p
+	}
+	
+	public Bullet(String playerID, Position3D position, Quaternion3D angle) {
+		this.playerID = playerID;
+		this.position = position;
+		this.angle = angle;
+	}
+
+	public String getPlayerID() {
+		return playerID;
+	}
+	
+	public Position3D getPosition() {
+		return position;
+	}
+
+	public Quaternion3D getAngle() {
+		return angle;
+	}
+
+	public void setPlayerID(String playerID) {
+		this.playerID = playerID;
+	}
+	
+	public void setPosition(Position3D positon) {
+		this.position = positon;
+	}
+
+	public void setAngle(Quaternion3D angle) {
+		this.angle = angle;
+	}
+	
+	public void update(Position3D position, Quaternion3D angle) {
+		setPosition(position);
+		setAngle(angle);
+	}
+}
diff --git a/src/main/java/cactusServer/entities/Instance.java b/src/main/java/cactusServer/entities/Instance.java
index 5874cce..8d850bb 100644
--- a/src/main/java/cactusServer/entities/Instance.java
+++ b/src/main/java/cactusServer/entities/Instance.java
@@ -36,6 +36,7 @@
 	private HashMap<String, Area> areaMap = new HashMap<>();
 	private HashMap<String, Object> objMap = new HashMap<>();
 	private HashMap<String, Character> characterMap = new HashMap<>();
+	private HashMap<String, HashMap<String, Bullet>> bulletMap = new HashMap<>();
 	@JSONHint(ignore = true)
 	public static final int UNIQUE_ID_LENGTH = 12;
 
@@ -116,6 +117,10 @@
 	public Character getCharacter(String characterId) {
 		return characterMap.get(characterId);
 	}
+	
+	public HashMap<String, HashMap<String, Bullet>> getBullets() {
+		return bulletMap;
+	}
 
 	public void setName(String name) {
 		this.name = name;
@@ -161,6 +166,15 @@
 		returnedMap.put(id, character);
 		return returnedMap;
 	}
+	
+	public HashMap<String, Bullet>createBullet(String playerID, String bulletID, Position3D position, Quaternion3D angle) {
+		if (!bulletMap.containsKey(playerID)) {
+			bulletMap.put(playerID, new HashMap<String, Bullet>());
+		}
+		HashMap<String, Bullet> map = bulletMap.get(playerID);
+		map.put(bulletID, new Bullet(playerID, position, angle));
+		return map;
+	}
 
 	public Instance update(Instance.State state) {
 		setState(state);
diff --git a/src/main/java/cactusServer/resources/BulletsRest.java b/src/main/java/cactusServer/resources/BulletsRest.java
new file mode 100644
index 0000000..cf6f3e3
--- /dev/null
+++ b/src/main/java/cactusServer/resources/BulletsRest.java
@@ -0,0 +1,63 @@
+package cactusServer.resources;
+
+import java.util.HashMap;
+
+import javax.ws.rs.FormParam;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.PUT;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.WebApplicationException;
+import javax.ws.rs.core.MediaType;
+
+import org.ntlab.radishforandroidstudio.framework.model3D.Position3D;
+import org.ntlab.radishforandroidstudio.framework.model3D.Quaternion3D;
+
+import cactusServer.entities.Bullet;
+import cactusServer.entities.Instance;
+import cactusServer.models.Instances;
+import net.arnx.jsonic.JSON;
+
+@Path("/instances/{instanceId}/bullets")
+public class BulletsRest {
+	
+	@GET
+	@Produces(MediaType.TEXT_PLAIN)
+	public String getBullets(@PathParam("instanceId") String instanceId) {
+		return JSON.encode(Instances.getInstance().getInstance(instanceId).getBullets());
+	}
+
+	@Path("/{playerId}")
+	@POST
+	@Produces(MediaType.TEXT_PLAIN)
+	public String createBullet(@PathParam("instanceId") String instanceId, @PathParam("playerId") String playerId, 
+			@FormParam("bulletId") String bulletId, @FormParam("position") Position3D position, @FormParam("angle") Quaternion3D angle) {
+		Instance instance = Instances.getInstance().getInstance(instanceId);
+		HashMap<String, Bullet> idMap = instance.createBullet(playerId, bulletId, position, angle);
+		HashMap<String, Bullet> uriMap = new HashMap<>();
+		for (String id : idMap.keySet()) {
+			String uri = (InstancesRest.INSTANCES_URI + "/" + instanceId + "/bullets/") + playerId + "/" + id;
+			uriMap.put(uri, idMap.get(id));
+		}
+		return JSON.encode(uriMap);
+	}
+
+	@Path("/{playerId}/{bulletId}")
+	@PUT
+	@Produces(MediaType.TEXT_PLAIN)
+	public String updateBullet(@PathParam("instanceId") String instanceId, @PathParam("playerId") String playerId,
+			@PathParam("bulletId") String bulletId, @FormParam("position") Position3D position, @FormParam("angle") Quaternion3D angle) {
+		Instance instance = Instances.getInstance().getInstance(instanceId);
+		HashMap<String, Bullet> map = instance.getBullets().get(playerId);
+		if (map != null) {
+			Bullet bullet = map.get(bulletId);
+			if (bullet != null) {
+				bullet.update(position, angle);
+			}
+			return JSON.encode(map);
+		}
+		throw new WebApplicationException(400);
+	}
+}
diff --git a/src/main/java/cactusServer/utils/App.java b/src/main/java/cactusServer/utils/App.java
index 2c2aa6c..0eec1bc 100644
--- a/src/main/java/cactusServer/utils/App.java
+++ b/src/main/java/cactusServer/utils/App.java
@@ -86,6 +86,10 @@
 		// �_�~�[�I�u�W�F�N�g
 		Instances.getInstance().getInstance("test1").createObject(new Position3D(0, 0, 0), new Velocity3D(),
 				new AngularVelocity3D(), new Quaternion3D(), new Attribute(true, 1), 0);
+		// �_�~�[�o���b�g
+		Instances.getInstance().getInstance("test1").createBullet("player1", "testBulletId1", new Position3D(), new Quaternion3D());
+		Instances.getInstance().getInstance("test1").createBullet("player1", "testBulletId2", new Position3D(), new Quaternion3D());
+		
 		// // �m�F�p
 		// String player1Encode = JSON.encode(player1, true);
 		// String player2Encode = JSON.encode(player2, true);