In order to provide a member for producing a probe array that allows producing desired probe arrays immediately once the probe arrangement is established, and to provide a probe array producing method that uses this member for producing a probe array, the pieces F.sub.1, F.sub.2 . . . F.sub.n are produced by cutting the members M.sub.1, M.sub.2 . . . M.sub.n for producing a probe array, and a predetermined number of pieces F.sub.1, F.sub.2 . . . F.sub.n are detached from a release sheet 13 and are attached via the adhesive layer 12 onto the supporting member 2a at predetermined locations.