The stop has a bearing (12) comprising an upper washer (14) and a lower washer (16) defining a rolling path on which rolling bodies (18) are rolled, where the lower washer integrates a support interface against an upper end of a helical spring (22). A rigid fixing element (26) fixes a MacPherson strut to a superstructure of a vehicle. An impact stop (30) comprises an annular strip (36) placed in an annular volume (38) delimited axially by a lower bearing (40) integrated to the upper washer and an upper bearing integrated to a rigid element. An independent claim is also included for a MacPherson strut comprising a telescopic shock absorber.