To support a surgery by simply providing a virtual image corresponding to a live endoscopy image on a real time basis.

This surgery supporting apparatus 1 comprises a rigid scope 2, a VE image creating device 3, a system controller 4, a CCU 5, a light source device 6, a pneumoperitoneum device 7, an electrocautery 8, an ultrasonic treatment device 9, a VTR 10 and the like. The VE image creating device 3 is provided with a recording part 31 storing CT image DB constructed of a plurality of CT images, an insertion amount detecting part 21, a tilt angle sensor 22, an XY insertion point measuring instrument 25, a Z insertion point measuring instrument 27, a communication I/F part 33 transmitting/receiving data with the system controller 4, and an VE image construction part 34 constructing the VE image on the basis of various types of data obtained from the communication I/F part 33 and the CT images of the CT image DB.