PURPOSE: To provide a contact type cooler which can suppress an impact as far as possible to be in contact and efficiently quickly cool in a contact state.

CONSTITUTION: Carbon fibers are implanted to contact surfaces of two cooling members 13 for constituting a cooler 10 in contact with a sample vessel 12 in which sample 11 of a material to be cooled is filled to provide a brushlike buffer member 15. The members 13 are moved by a moving mechanism to be brought into contact with the vessel 12. Thus, an impact load of the fibers of the member 15 in contact with the vessel 12 is suppressed as much as possible by flexibility of the fibers, and the sample 11 is efficiently quickly cooled by thermal conduction according to magnitude of thermal conductivity of the fiber. Accordingly, a material experiment can be conducted without affecting adverse influence to an infinitesimal gravity in the universe.