Improved "moving red dot" sighting device, including a fixed light source (4) and a reflecting element (17), whereby the light source (4) produces a collimated light beam (5) which is projected onto the reflecting element (17) so as to obtain a red dot or reticle which is visible to the shooter thanks to the reflection on the reflecting element (17), and whereby the beam (5) is projected onto the reflecting element (17) by means of a rotating mirror (9) whose inclination angle (B) in relation to the light beam (5) can be adjusted.