Display device

A display device, comprising:

• a first lens tube including a closed bottom and a first display part on the closed bottom, the first display part being for displaying a first image;
• a second lens tube including a closed bottom and a second display part on the closed bottom, the second display part being for displaying a second image;
• an adjustment mechanism including an operable part provided between the first lens tube and the second lens tube that adjusts a distance between the first lens tube and the second lens tube;
• and
• an eye cup provided for each of the first lens tube and the second lens tube that is tubular and detachably attached to an open end of the first lens tube or the second lens tube,
• wherein the eye cup includes:
• an insertion part that is tubular and inserted inside the first lens tube or the second lens tube;
• and a cup part having a curved sheet shape that extends outside of the first lens tube or the second lens tube, and
• the eye cup includes:
• a narrow part between the insertion part and the cup part, the narrow part being formed around an entire circumference of an outer surface of the eye cup;
• and
• a thick part formed to fill in a space defined by the narrow part, at an intersection of a line and the narrow part, the line being parallel to an arrangement direction of the first lens tube and the second lens tube and passing through a center of the narrow part in a height direction perpendicular to the arrangement direction.