To provide a head-mounted binocular magnifying glass device capable of capturing an image matching a situation an operator observes.

A light beam b guided from an objective optical system 9 via a zoom optical system 13 is divided into two beams by a beam splitter 19, and one is guided to an ocular optical system 31 and the other is to a camera 38, so that the image captured by the camera 39 accurately matches the situation of a surgical part visually observed by the operator A. As a result, when the image is displayed in a stereo viewer 49, both the operator A and an assistant or the like can look at the same situation of the surgical part, and the mutual understanding on the surgical part by both people can be easily attained. Since the width of an objective mirror tube, by which the surgical part is visually observed (photographed), is fixed even if the operator A adjusts the pupil distance by rotating an ocular mirror tube in the left/right directions, the surgical part can be visually observed(photographed) always at the same angle of convergence even if the operator A moves the ocular mirror tube.