Provided is an affixing hardware for a panel, the affixing hardware being capable of absorbing a change in dimensions caused by the expansion of a siding board, etc. Comb-like slits (Sh, SV1-SV4) are formed in a portion of a metallic plate, the portion being located on the lower side of the paper sheet relative to an intermediate line (C) defined between two opposing sides (1a, 1b) of the metallic plate, to form plate spring-like band plates (41-43). The band plates (41-43) are folded along the intermediate line (C) and along a folding line (F) to form affixation sections (41a-43a) and engagement sections (41b-43b) on the band plates (41-43), and this enables the affixation ends (52a, 52b) of a siding board (50) to be engaged with the engagement sections (41b-43b). The tilt angle (theta 1) of the affixation section (41a) provided to the center band plate (41) and the tilt angle (theta 2) of the left and right affixation sections (42a, 43a) are set to be different, and this enables the band plates (41-43) to be elastically deformed with an increase in the dimensions of the siding board due to expansion.