Handling device for moulds intended notably for plastic parts injection comprising: - a connecting piece designed to be connected to a lifting platform, - a gripping base designed to grasp onto an element (2, 2') attached to a mould, said gripping base comprising: ∘ a central opening designed to house said element (2, 2') attached to a mould and ∘ a locking device (10, 11), designed to lock the position of said element (2, 2') in the gripping base with the locking device (10, 11) being designed to adopt a locking and an unlocking position, - and a control device to control the movement of the locking device (10, 11) from the locking to the unlocking position, with the system comprising two partitions fixed on either side of said gripping base, each one possessing an oblong opening, with the two oblong openings opposite one another, and said connecting piece consisting of a transverse arm which passes through the oblong openings which is mobile and moves between an initial position and a second position in said oblong openings, characterised by the fact that this locking device (10, 11) comprises at least two elements forming a jaw, with said elements being mounted in a mobile position to move between: - the locking position according to which the mobile elements are positioned close to one another and the unlocking position in which the mobile elements are separated from one another and that each of said elements, of which there are at least two forming a jaw, presents a sloping section designed to slide due to gravity on an internal sloping section in the gripping base of the device. - a connecting piece designed to be connected to a lifting platform, - a gripping base designed to grasp onto an element (2, 2') attached to a mould, said gripping base comprising: ∘ a central opening designed to house said element (2, 2') attached to a mould and ∘ a locking device (10, 11), designed to lock the position of said element (2, 2') in the gripping base with the locking device (10, 11) being designed to adopt a locking and an unlocking position, ∘ a central opening designed to house said element (2, 2') attached to a mould and ∘ a locking device (10, 11), designed to lock the position of said element (2, 2') in the gripping base with the locking device (10, 11) being designed to adopt a locking and an unlocking position, - and a control device to control the movement of the locking device (10, 11) from the locking to the unlocking position, with the system comprising two partitions fixed on either side of said gripping base, each one possessing an oblong opening, with the two oblong openings opposite one another, and said connecting piece consisting of a transverse arm which passes through the oblong openings which is mobile and moves between an initial position and a second position in said oblong openings, - the locking position according to which the mobile elements are positioned close to one another and the unlocking position in which the mobile elements are separated from one another and that each of said elements, of which there are at least two forming a jaw, presents a sloping section designed to slide due to gravity on an internal sloping section in the gripping base of the device.