To provide a cassette carrying device for reducing weight of the cassette carrying device, reducing cost of the device, improving vibration control performance, and improving operability of a worker.

This carrying device has a slide fork 3 for transferring a cassette 1 for housing a base board, a vibration control mechanism 20, and a support plate 9 installed in the slide fork via the vibration control mechanism 20. The vibration control mechanism 20 has a vibration control material 21 composed of an elastic body having the vibration control function. An upper bolt 21a of the vibration control material 21 is fixed to the support plate 9 for transferring the cassette 1. A lower bolt 21b of the vibration control material 21 is fixed to a plate 3a of the slide fork 3. A vibration control ring 22 is arranged around the vibration control material 21, and restrains horizontal directional rocking of the support plate 9.