The present invention relates to a Door-locking device (1) for a household appliance (E), said household appliance (E) being of the type comprising a door provided with a lug (14), said door locking device (1) comprising a containment casing (10), fixable to said household appliance (E), a hook (11), arranged into said containment casing (10), capable of moving from a disengagement position, in which said lug (14) does not contact said hook (11), to an engagement position, in which said lug (14) is engaged with said hook (11) and said hook (11) is free to move along the movement direction of said lug (14), an abutment element (15) fixed on said containment casing (10), and elastic means (13), interposed between said hook (11) and said abutment element (15), wherein when said hook (11) is in said disengagement position, said elastic means (13) are compressed, and when said hook (11) is in said engagement position, said elastic means (13) expand, so that said hook (11) moves.