To provide a scroll type fluid device capable of attempering interference of a key of an Oldham link and a key groove, remarkably reducing abrasion caused by it and practically and sufficiently reducing mechanical loss.

Chamfer parts 71a, 72a are provided on head end parts of the keys 71, 72 of the Oldham link 7 fitted to the key groove 65 free to slide and/or inlet sides of the keys 71, 72 on the key groove 65 on the scroll type fluid device having the Oldham link 7 interposed between the key groove provided on a scroll member and the key groove 65 provided on a fixed side member to support the scroll member, to allow revolution of the scroll member, and to avoid autorotation of the scroll member.