Abstract: A stamping device (10) which comprises a body (11) having an open bottom end (12), a stamping member (21) provided at the body bottom end (12), a skirt (14) supported at the body bottom end (12) around the stamping member (21) for movement between a lower position to protect the stamping member (21) and an upper position to expose the stamping member (21) for stamping operation, and a spring (15). The spring (15) forms a one-piece structure with the skirt (14) and is adapted to resiliently bias the skirt (14) into the lower position. The spring (15) comprises opposite sides (16) joining the skirt (14) and an upper side (17) extending across the opposite sides (16).