There is disclosed an organ-adhesion preventing agent comprising a
chemically-crosslinked .gamma.-polyglutamic acid as an effective
ingredient, as well as a process for preventing organ from adhesion
comprising a step of bringing the adhesion-preventing agent into contact
with or depositing the same onto the surface of a local organ and
optionally the neighborhood thereof to be prevented from the
post-operative adhesion. According to the present invention, there is
provided an adhesion-preventing agent which is capable of effectively
preventing the surfaces of organs from adhesion, and which can be
absorbed in the body with high safety and be produced with ease and has
high practical usefulness, as well as a process for preventing organ from
adhesion by using the adhesion-preventing agent.