The utility model discloses a seal which comprises a handle upper cover, a handle lower cover, a spring, a seal base, a positioning connecting piece, a stamp cushion assembly part which are connected from up to down in sequence through a connecting rod; the positioning connecting piece is arranged between the stamp base and the seal cushion assembly part; the lower cover is arranged under the seal cushion assembly part; an adjusting part is arranged between the handle lower cover and the seal base; and the spring is arranged in the adjusting part. A transparent visual window arranged on the seal base can ensure that when in use, the seal is accurately positioned, and can not occur the situations of covering improperly; the adjusting part can ensure that the stamp can achieve the clear effect under the state of full oil to out of gas and under the effect of different gravities; and a glue water dedicated connecting point designed in the seal assembly part can ensure that when being assembled, a penetrative stamp cushion, an original character stamp cushion or a photosensitive stamp cushion can be directly fixed by glue water, thereby preventing the secondary oil injection of the stamp cushion from being influenced.