The invention relates to a face and mouth muscle stimulator formed by an approximately oblong, oval body (1) to be placed in the mouth, having an open central part and side ends (2) that are wider than the upper and lower mid-zones (3) which are provided with V-shaped recesses (4) at the position of the frenulum. Optionally, the invention can include fixed or removable projections (5) positioned on the stimulator or on attachments (8). The invention can also include a sheet (6) provided with holes (7) for the connection of elements such as bottles or pacifiers or provided with a horizontal groove (11) for the incorporation of a bite splint (12) coupled at the front (2b) thereof using T-shaped flanges (13). Alternatively, the body (1′) can have a V-shaped configuration formed by vertical walls (20 and 30) in order to be positioned in the inner space of the lower jaw, including perpendicular projections (40 and 50) by way of horizontal bite planes.
