Abstract: A chain block having an attaching member connected to the load-free end link of a load chain entrained around a load sprocket wheel rotatably supported by and between a pair of lateral plates. The attaching member is pivotally mounted at one end portion thereof between the pair of lateral plates by a pin which extends through the attaching member and the pair of lateral plates. The other end portion of the attaching member at which the latter is connected to the load-free end link of the load chain is formed on both sides thereof with boss-like projections adapted to abut against the peripheries of the pair of lateral plates to thereby increase the strength with which the load-free end link of the load chain is attached to the pair of lateral plates, thereby improving the safety of the chain block.