Structural thermoplastic part production device, intended to be integrated to a primary structure of an aeroplane, said structural part being formed from a draft part comprising reinforcing fibres embedded in a thermoplastic matrix, production device comprising a member for supporting a draft part, at least one heating member, at least one cooling member, at least one main compression member configured to compress the local portion of the draft part against the support member so as to decrease the porosity thereof and a system for moving the heating member, the compression member and the cooling member so as to stiffen each local portion of the draft part successively.