Provided is a surgical device that can give an accurate feeling of depth even when the surgical device is inserted in a horizontal direction on left and right images. Therefore, a plurality of indicators 55 are provided in a shaft section 52 and an interval d between the respective indicators 55 adjacent to each other is set to an interval for always setting an interval D between the respective indicators 55 on the left and right respective images to be larger than a shift amount |XL-YR| in a left-right direction of the corresponding indicators 55 between the left and right images when an image of the shaft section 52 is picked up in a state in which the shaft section 52 is orthogonal to optical axes Ol and Or of left and right image pickup optical systems 171 and 17r within a predetermined error range.