PROBLEM TO BE SOLVED: To provide an automatic stamping device which uniformly applies ink to a seal impression face of a seal.
SOLUTION: A seal supporting part 18 supports the seal 10 by making the seal impression face 12 downward. A vermilion ink-pad supporting part 20 supports the vermilion ink-pad 14 by directing an ink face 40 downward. A seal reciprocating part 24 simultaneously reciprocates the seal supporting part 18 and the vermilion ink-pad supporting part 20 in the rising and falling directions. As a result, the seal 10 and the vermilion ink-pad 14 are simultaneously risen and fallen. A sponge 16 is made of a material having water-absorbing properties and plays a role as the intermediary for applying the ink on the ink face 40 to the seal impression face 12.