To shorten time required for a teaching work for a robot and reduce burden of an operator.SOLUTION: A teaching work support system 60 includes: teaching data DT1 which has a target position posture of an end effector provided at a tip of a mounted robot and control information on a robot corresponding to each target position posture; a laser tracker 50 which measures a position posture of the end effector when operating the mounted robot in accordance with the teaching data DT1; and a correction teaching data preparation section 64 which prepares correction teaching data DT2 which corrects the teaching data DT1 so that the position posture measured by the laser tracker 50 is brought close to the target position posture of the end effector in the teaching data. The laser tracker 50 defines a coordinate system by detecting the positions of three reflectors for coordinate system definition provided in a flat plate section and measures the position posture of the end effector in the coordinate system.SELECTED DRAWING: Figure 5
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