PROBLEM TO BE SOLVED: To provide a pressed flower decoration in which a moisture-proof sheet and a transparent plate can easily be sealed and fixed even by a person who is not an expert without causing wrinkles, and the work is comfortable and it can simply be manufactured even without the troublesome work.SOLUTION: A pressed flower decoration comprises: pressed flower preservatives 13 obtained such that release paper of a moisture-proof sheet with a frame 9 mounted thereon is pressed to the side of the frame 9 to form a recess, and then the release paper is removed, and thereafter fixed to an adhesive layer of the recess of the frame 9 or an adhesive layer portion, and a mount 14 a pressed flower 15 disposed on the mount 14 and a transparent plate 16 covering the pressed flower 15, and having an outer circumferential part fixed by slidably moving the frame 9 while pressing to the other side from one side and removing an internal air in the adhesive layer of the moisture-proof sheet at the outside more than the mount 14 or in the adhesive layer.