diff --git a/docker.md b/docker.md
index 2d09e7485ce74a4ea52aeb52b8ddc499937fa1b9..2db85564dc487028c3d7598109bc548592c2df09 100644
--- a/docker.md
+++ b/docker.md
@@ -75,7 +75,7 @@ $ bash run_docker.sh
 ### terminal 2
 
 ```
-$ sudo Docker exec -it sim roslaunch rois_Gazebo spawn_human.launch
+$ sudo docker exec -it sim roslaunch rois_Gazebo spawn_human.launch
 ```
 
 人間のモデルがシミュレーション内に出現し、キーボードによる遠隔操作が可能となる。
@@ -105,7 +105,7 @@ Service Applicationが起動する
 ### terminal 5
 
 ```
-$ sudo Docker exec -it einohira/ros:gazebo-rois rostopic pub /robot1/detected_text std_msgs/String "data: 'point_a'"
+$ sudo docker exec -it einohira/ros:gazebo-rois rostopic pub /robot1/detected_text std_msgs/String "data: 'point_a'"
 ```
 # Dockerfile