Abstract: A mouth cavity irrigation device comprising a main body (10) and an elongate, generally tubular reservoir (12) removably connected thereto, to provide a handle member. The reservoir holds a quantity of fluid (14), such as water, and can be removed from the main body (10) so as to be cleaned or emptied of or filled with liquid. The main body (10) has an outlet (16) to which is removably and rotatably connected an elongate, generally frusto-conical nozzle (18) having a generally central channel (19) which runs from an inlet (21) to a relatively narrower outlet (24). A manually-operated pump (26) is housed within the main body (10) and a dip tube (28) is connected at one end to a stepped cylinder (29) forming part of the pump (26), the other end of the dip tube (28) extending into the reservoir (12). A manually operable button (41) which activates the arrangement is provided on the outer wall of the main body (10).