PURPOSE: To realize economization of set height about which a door of a cassette inserting port is also considered, by constituting so that a cassette holder supports an inserted cassette, shifting it in the depth direction, and lifting it upward simultaneously with shifting it to the depth direction at a prescribed position.

CONSTITUTION: A cassette 1 is set to a cassette holder 2. In this case, a driving mechanism is operated and shifts the cassette holder 2 in accordance with a guide 3 of a side chassis. In case of shifting it in the depth direction, the guide 3 is turned upward from a position where a pushed-up door 4 does not obstacle, the cassette holder rises in a state that the cassette remains supported, and it crosses over a capstan 5. Thereafter, it descends and is installed to a running mechanism 6. In this case, the overall set height is controlled by the sum of capstan height h1 and cassette thickness (t) but a space for the door is economized.