A dental handpiece (P) is disclosed which has a head housing (4), a gear shaft (5) having a gear part (7) with gear teeth and a shaft part (8) extending from the gear part (7), and a dust control seal (9) sealingly fit on the circumferential surface of the shaft part (8) of the gear shaft (5). The dust control seal (9) is an annular member, and has a seal body (37), a first lip (38) projecting radially inwardly from the seal body (37), and a second lip (39) projecting radially inwardly from the seal body (37) above and spaced apart from the first lip (38), with a space (40) defined between a contact area between the first lip (38) and the shaft part (8), and a contact area between the second lip (39) and the shaft part (8).
