Method of producing a film connective tissue body using a connective tissue body formation substrate

A method of producing a film connective tissue body using a connective tissue body formation substrate comprising two tissue formation surfaces facing each other with a tissue formation space interposed therebetween and a slit at least in one of the tissue formation surfaces, the method comprising:

• an installing process of installing the connective tissue body formation substrate comprising two tissue formation surfaces facing each other with a tissue formation space interposed therebetween and a slit at least in one of the tissue formation surfaces in an environment where a biological tissue material is present,
• a forming process of forming a connective tissue in the tissue formation space while the connective tissue is formed around the connective tissue body formation substrate,
• a removing process of removing the connective tissue body formation substrate from the environment, wherein the connective tissue body formation substrate is fixed, and the connective tissue in a periphery is cut out along an outer surface of the connective tissue body formation substrate and then the connective tissue body formation substrate is removed, and
• a separating process of peeling the connective tissue in the tissue formation space off the tissue formation surface and removing the connective tissue as a film connective tissue.