A device for releasably connecting a weight pouch to a pocket of a scuba diving jacket. The device comprises a relatively flat sheath connected to and integrally with the diving jacket. A latch member is attached to the weight pouch, the latch member having arms that are elastically deformable in a plane of the sheath and sides tapered relative to a longitudinal plane of symmetry of the sheath to provide snap closure when the latch member is inserted in the sheath. An inward ly-projecting abutment inside the sheath engages ends of the arms when the device is in a closed position, thereby preventing the latch member from sliding out of the sheath. A member is provided for bending the arms of the latch member so as to release them from a position such that they meet the abutment and enable the device to be opened. The bending member includes a cap slidingly mounted on the latch member and contains tapered projections for engaging the tapered sides of the arms. Upon movement of the cap relative to the latch member that induces elastic deformation of the arms, the tapered projections release the ends of the arms from the abutment in the sheath. The cap and the latch member are preferably connected to the same handle for inducing their relative movement by respective flexible connection elements. The element connecting the handle to the latch member is longer than that connecting the handle to the cap, so that the tensile force exerted on the handle first causes relative movement of the cap with respect to the latch member inside the sheath.