Removable connecting device of a wrist band to a component to which the wrist band is to be attached, in particular a watch case , this device comprising two complementary coupling members intended to be secured to the connection ends of said wrist band and to said component, respectively, device in which : - the first of said coupling members is configured to be movable according to a first transversal direction (Y), laterally relatively to the longitudinal direction (X) of the wrist band, and between two end positions, a first end position in which it is engaged with the second of said coupling members, and a second end position in which it is dissociated from this second coupling member , elastic return means of the device tending to keep said first coupling member in said first end position, - The first coupling member has a coupling element extending along a second transversal direction (Z), different from said first transversal direction and relatively to said longitudinal direction (X) of the wrist band, and being bisected by a rod associated to a pusher member comprising a head , said coupling element being adapted to cooperate with a transverse housing of the second coupling member ; and - the second coupling member comprises said transverse housing and a coupling element extending also in said second transversal direction (Z), said coupling element being bisected by a passage for receiving said rod of the first coupling member during coupling of the two coupling members together, The device being characterized in that : - said coupling means have snap-fastening elements to permit causing the movement of said first coupling member against the pressure of said elastic return means , from its first to its second end position during the coming into engagement of the two coupling members in the longitudinal direction (X). - the first of said coupling members is configured to be movable according to a first transversal direction (Y), laterally relatively to the longitudinal direction (X) of the wrist band, and between two end positions, a first end position in which it is engaged with the second of said coupling members, and a second end position in which it is dissociated from this second coupling member , elastic return means of the device tending to keep said first coupling member in said first end position, - The first coupling member has a coupling element extending along a second transversal direction (Z), different from said first transversal direction and relatively to said longitudinal direction (X) of the wrist band, and being bisected by a rod associated to a pusher member comprising a head , said coupling element being adapted to cooperate with a transverse housing of the second coupling member ; and - the second coupling member comprises said transverse housing and a coupling element extending also in said second transversal direction (Z), said coupling element being bisected by a passage for receiving said rod of the first coupling member during coupling of the two coupling members together, - said coupling means have snap-fastening elements to permit causing the movement of said first coupling member against the pressure of said elastic return means , from its first to its second end position during the coming into engagement of the two coupling members in the longitudinal direction (X). <EOS>