Provided is a release sheet including a substrate and a release layer, wherein the release layer is composed of a crosslinked product of a resin composition containing a polyolefin resin having a reactive functional group and a crosslinking agent; and the content of the polyolefin resin having a reactive functional group is from 50 to 90% by mass, and the content of the crosslinking agent is from 7 to 45% by mass, relative to the whole amount of the resin composition.