The invention relates to a mobile threading unit (10) for threading warp threads (20) of a warp into elements of a harness, having at least one providing apparatus (33, 43, 51) for providing elements of the harness, at least one receiving apparatus (32, 42, 51) for receiving elements of the harness with a threaded warp thread (20), a threading module (II) which is configured for separating an element from the at least one providing apparatus (33, 43), for gripping a respective warp thread (20), for threading said warp thread (20) into the separated element, and for placing the element with the threaded warp thread (20) on one of the receiving apparatuses (32, 42), wherein the threading unit (10) can be displaced spatially for threading individual warp threads (20).