A blood vessel display device for displaying a blood vessel existing directly underneath a skin by performing near infrared ray photographing of a surface of the skin in a state of irradiating the skin surface with near infrared rays through a near infrared ray irradiation means, the blood vessel display device comprising: a photographing means which includes a first photographing portion having an optical system for performing near infrared ray photographing by using the optical system, and a second photographing portion having an optical system for performing near infrared ray photographing by using the optical system; at least either one of the first photographing portion and the second photographing portion is provided so that a first optical axis, which is an axis of an optical system of the first photographing portion, and a second optical axis, which is an axis of an optical system of the second photographing portion, intersect with each other on the skin surface; an image display means which includes a first image display means configured to display a first picture, which is a near infrared ray picture photographed by the first photographing portion; characterised in that it further comprises: a first guide beam irradiation means configured to irradiate directional visible light in a direction in which the first photographing portion photographs; and a second guide beam irradiation means configured to irradiate directional visible light in a direction in which the second photographing portion photographs; wherein the image display means further includes a second image display means configured to display a second picture, which is a near infrared ray picture photographed by the second photographing portion, the first photographing portion and the first image display means are integrally constituted on both sides, the second photographing portion and the second image display means are integrally constituted on both sides, at least either one of a relative relationship between the position of the first optical axis and the position of the second optical axis and a relative relationship between the direction of the first optical axis and the direction of the second optical axis is possible to be changed, and by allowing visible light irradiated from the first guide beam irradiation means and visible light irradiated from the second guide beam irradiation means to intersect with each other on a skin surface, the first optical axis and the second optical axis are enabled to intersect with each other on the skin surface. a photographing means which includes a first photographing portion having an optical system for performing near infrared ray photographing by using the optical system, and a second photographing portion having an optical system for performing near infrared ray photographing by using the optical system; at least either one of the first photographing portion and the second photographing portion is provided so that a first optical axis, which is an axis of an optical system of the first photographing portion, and a second optical axis, which is an axis of an optical system of the second photographing portion, intersect with each other on the skin surface; an image display means which includes a first image display means configured to display a first picture, which is a near infrared ray picture photographed by the first photographing portion; a first guide beam irradiation means configured to irradiate directional visible light in a direction in which the first photographing portion photographs; and a second guide beam irradiation means configured to irradiate directional visible light in a direction in which the second photographing portion photographs; wherein the image display means further includes a second image display means configured to display a second picture, which is a near infrared ray picture photographed by the second photographing portion, the first photographing portion and the first image display means are integrally constituted on both sides, the second photographing portion and the second image display means are integrally constituted on both sides, at least either one of a relative relationship between the position of the first optical axis and the position of the second optical axis and a relative relationship between the direction of the first optical axis and the direction of the second optical axis is possible to be changed, and by allowing visible light irradiated from the first guide beam irradiation means and visible light irradiated from the second guide beam irradiation means to intersect with each other on a skin surface, the first optical axis and the second optical axis are enabled to intersect with each other on the skin surface.