To provide a disk unit which can be small-sized.

A moving direction of an optical head 31 for recording information based on photographing in a lens part 10 onto a disk 2, in a diameter direction of the disk 2, is moved obliquely to a central axis direction of an objective lens part 11. Thus, a moving amount of the optical head 31 in a main photographing direction can be reduced. Therefore, a length of a main body part 20 in the main photographing direction, namely, in a lengthwise direction can be shortened. As a result, a camcorder 1, as an example of the disk unit, can be small-sized.