A dental handpiece (1) includes a head (2) suitable for driving a tool, a body (3) having a proximal section (4) extending in a longitudinal direction (I-I) and intended to be connected, by a proximal end surface (5), to a distal surface of a drive motor, an indexing device (8) suitable for rotatably positioning the body (3) of the dental handpiece (1) about the longitudinal direction (I-I) relative to the drive motor, an electric device (9) for lighting the working area of the tool, and a device (10) for supplying electric power to the electric lighting device (9). The indexing device (8) is retractable or set back from the proximal end surface (5), and the electric supply device (10) includes a retractable electrical connection device (11).