Head-mounted display device and control method of head-mounted display device

A control method of a head-mounted display device that includes a pair of display drive units generating and emitting image light representing an image and that enables a user to visually recognize a virtual image and an external scene, comprising:

• (a) controlling the pair of display drive units so as to emit the image light from emission areas of the display drive units,
• wherein the controlling (a) includes controlling the pair of display drive units so as to move the emission areas in any one of a first direction in which an image formed by the image light emitted from one of the display drive units and an image formed by the image light emitted from the other of the display drive units move close to each other in cooperation and a second direction in which an image formed by the image light emitted from one of the display drive units and an image formed by the image light emitted from the other of the display drive units move apart from each other in cooperation to change a focal distance of an image in a virtual image which is visually recognized by the user.