To provide a biocompatible implant containing a polymer base material for in-situ implant fixation and a reactive component.

This reactive surgical implant is a medical device which includes the base material which is combined with the reactive component. In this case, the combination between the base material and the reactive component makes this reactive implant which can be combined with the tissue surface at the time of the implantation. The base material contains collagen, and the system contains a genipin solution. In this case, the system further includes a means which brings the base material into contact with the genipin solution to make the reactive implant and a means for implanting the reactive implant in the tissue.