Disclosed is a method for detecting positions of body tissues and an apparatus using the method. The apparatus according to the present invention comprises a surgery information storage unit storing an examined first image associated with a target bone of surgery, a position measuring unit measuring position values of multiple points on a surface of the target bone of surgery before and after cutting, and a registration control unit for acquiring a second image regarding the remained bone after cutting by applying the shape of the bone changed according to the progression of bone cutting to the first image, and for performing position registration with respect to the second image by using the position values of multiple points on surface of the target bone of surgery after cutting, which is measured by the position measuring unit.
