Head-mounted display device

The invention provides a head-mounted display device. The head-mounted display device comprises a projection device, a waveguide element and a shading element, the projection device is used for providing an image light beam and comprises a lens module which is used for transmitting the image light beam. The at least one waveguide element is provided with a light inlet end and a light outlet end, the light inlet end is used for receiving the image light beam, and the image light beam is transmitted by the at least one waveguide element and is emitted by the light outlet end. The shading element is arranged between the projection device and the light inlet end of the at least one waveguide element, the image light beam leaves the projection device and converges to the diaphragm, and the diaphragm is located outside the projection device and located on the at least one waveguide element. The head-mounted display device can effectively reduce generation of unexpected light rays or light spots so as to prevent noi