A three-dimensional reconstruction device (60) comprises: a three-dimensional information acquisition unit (63) that acquires first three-dimensional information (D10) from a first sensor (10) which detects a target object, and that acquires second three-dimensional information (D50) from a second sensor (50) which is provided so as to be capable of movement and detects an area of interest (A1); a sensor information acquisition unit (62) that acquires first sensor information (I10) and second sensor information (I50); a position and orientation information acquisition unit (61) that acquires first position and orientation information (E10) and that acquires second position and orientation information (E50); and a three-dimensional reconstruction unit (64) that uses the first sensor information, the second sensor information, the first position and orientation information, and the second position and orientation information to reconstruct three-dimensional information representing the area of interest from the first three-dimensional information and the second three-dimensional information.
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