A chain lock has a chain engagement portion including a slot configured to allow a link of the chain to pass therethrough with the chain engagement portion engaging an adjacent link of the chain. The chain lock has a pivoting member with a proximal and distal end. The pivoting member pivots about the proximal end such that the distal end is movable between a first position in which the pivoting member distal end is spaced from the slot in a manner to allow a chain to be received in and removed from the slot and a second position in which the pivoting member distal end extends across the slot to prevent the chain from being received in and removed from the slot. The pivoting member has a pivot axis spaced from and parallel to the chain engagement portion.