To provide a head mounting type video display device which is simple in constitution, may be made inexpensive and is suitable for long-time use.

This head mounting type video display device has a video display means 37, optical systems 14 and 15 for projecting the videos projected by this video display means 37 and/or the ambient outside world to at least one eye part 102 of an observer, an armoring block 1 which contains the video display means 37 and the optical systems 14 and 15 and a supporting block 2 which is supported at the head 101 of the observer and holes the armoring block 1 at an observation position. The supporting block 2 has an elastically deformable head band 5 which extends to an arcuate form in the circumferential direction of the head, right and left supporting members 6L and 6R which are respectively coupled to both ends of the head band 5 and are disposed abuttably on the head 101 and right and left regulating means 7L and 7R which regulate the positions of the right and left supporting members 6L and 6R relative to the head 101.