Offline teaching device for robot

An offline teaching device for a robot, for teaching an operation of the robot offline, comprising:

• a storage unit that stores a program for causing the robot to perform an operation;
• a display control unit that causes a display unit on which a cursor is displayed to display four or more coordinate points based on teaching point data described in the program and causes the display unit to display one line connecting the four or more coordinate points successively;
• and
• a correction amount generation unit that, after two coordinate points are selected on the display unit from remaining coordinate points except the coordinate points serving as a starting point and an ending point of the line and one coordinate system is selected among a plurality of coordinate systems, generates correction amounts of the coordinate points without changing the teaching point data on the basis of dragging of a segment of the line between the selected two coordinate points by the cursor according to the selected coordinate system.