The invention relates to a cap for saliva ejector comprising a lateral wall almost frustoconical in shape interposed between a first and a second circular base which are mutually opposite. The cap comprises a circular through hole at the first base and a plurality of through grooves which, departing from said hole, radially cross the first base and continue longitudinally in the lateral wall over a portion thereof adjacent to said first base. The cap further comprises a circular opening at the second base to allow the connection thereof to a cannula of a saliva ejector. The cap is provided with a plurality of elements extended in length, some of which project transversely from the lateral wall, others also above the first base. The invention also relates to a saliva ejector comprising the aforesaid cap reversibly connected to a cannula at the second base thereof.
