Robot teaching device and robot teaching method

A robot teaching device for teaching a robot a series of tasks performed on a task object by an operator,

• the device comprising:
• a motion acquisition unit that acquires motion data indicating a position and an attitude of the operator or the task object;
• a feature amount acquisition unit that acquires feature amount data indicating a degree of influence of a motion of the operator on the task object;
• a priority period determination unit that determines a period during which the operator makes a motion indispensable for the series of tasks from among periods during which the motion data is acquired, as a priority period on a basis of the feature amount data;
• and
• a teaching data generation unit that generates teaching data to be input to the robot, the teaching data being generated on a basis of the motion data such that a motion of the operator in the priority period is reproduced while a motion of the operator in periods other than the priority period are not reproduced.