In a blood vessel display device that displays a blood vessel existing directly underneath a skin by performing near infrared ray photographing of the skin surface in a state in which the skin surface is irradiated with near infrared rays by using a near infrared ray irradiation means, wherein at least either one of a first photographing portion 11 and a second photographing portion 12 is provided so that a first optical axis, which is the axis of the optical system of the first photographing portion 11, and a second optical axis, which is the axis of the optical system of the second photographing portion 12, intersect with each other on the skin surface, at least either one of the relative relationship between the position of the first optical axis and the position of the second optical axis and the relative relationship between the direction of the first optical axis and the direction of the second optical axis is possible to be changed. FIG. 14 START S1 OBTAIN ANGLE INFORMATION AND POSITION INFORMATION S2 DISPLAY SCALES INDICATING BLOOD VESSEL DEPTH CORRESPONDING TO PARALLAX
