Described is a mould (1) for making a temporary prosthetic component for a knee in an operating room comprising: a first half-mould (10)； a second half-mould (20) which can be coupled to the first half-mould (10) for forming a moulding chamber (C) for a temporary prosthetic component made of medical cement； and elements (30) for fixing the first half-mould (10) to the second half-mould (20).Each fixing element (30) has a rod (31) configured for connecting the first half-mould (10) to the second half-mould (20) and defining a weakness neck (32) configured to allow a facilitated breakage of the rod (31).
