Abstract: A lifting hook that can be used to lift loads using lifting gear includes a hook-shaped part which hooks onto the load to be lifted and a chain length reducer secured to the hook. The reducer includes an orifice whose dimensions allow the links of the chain to pass through and then allow one of the links to be locked in position when the chain is taut, and elements for partially closing off the orifice which are hinged so that they can be released manually simply by pressing them so as to allow the length of the chain to be adjusted. The reducer includes a closure finger that closes off the hook-shaped part and the closing-off elements include self-locking members which hold the closure finger in the locked position on the part of the hook as long as the closing-off elements are disengaged from the orifice.