The invention relates to a device for changing the harness of a loom. It has two bearing columns arranged on a chassis, two jibs which can move vertically on the columns and horizontally extensible and a device o the jibs to transfer head frames. The head frame transfer device comprises two spaced boundary plates interconnected by at least one cross-member and fitted with guide rails for the head frames, and two spaced bearers on a transverse support connected to the boundary plates and which can pivot in relation to the transverse support to accept and transfer the head frames. In order to adapt the article changer to different weave widths, the distance between the boundary plates can b adjusted by hand or by a motor. To this end, the cross-members and the transfers support consist of two simultaneously actuated telescopic sections.