A motovibrator with continuous adjustment of the angular offset of the eccentric masses, comprising: a substantially box-like containment body which accommodates electric motor means which comprise a stator that is integral with said body and a rotor for the rotational actuation of a shaft about its own longitudinal axis, the opposite ends of the shaft protruding from the containment body and being each associated with at least one respective eccentric mass, wherein said shaft comprises a main section and a secondary section, which are mutually aligned along said longitudinal axis, the main section being actuated rotationally directly by said rotor, characterized in that: said main section and secondary section are coupled rotationally by interposition of transmission means which comprise a first epicyclic stage which is provided with a first sun gear rotationally actuated by said main section and a first annular element that is integral with said containment body, between which multiple first planetary gears are interposed which are supported rotationally by a first planet carrier, and a second epicyclic stage which is provided with a second planet carrier which is rotationally actuated by said first planet carrier and supports a plurality of second planetary gears which are interposed between a second annular element, which can be actuated rotationally about said longitudinal axis, and a second sun gear, which is coupled rotationally to said secondary section, the rotational actuation of the second annular element being adapted to vary continuously the relative angular position of the secondary section with respect to the main section and therefore the angular offset of the corresponding eccentric masses during the rotation of said sections. a substantially box-like containment body which accommodates electric motor means which comprise a stator that is integral with said body and a rotor for the rotational actuation of a shaft about its own longitudinal axis, the opposite ends of the shaft protruding from the containment body and being each associated with at least one respective eccentric mass, wherein said shaft comprises a main section and a secondary section, which are mutually aligned along said longitudinal axis, the main section being actuated rotationally directly by said rotor, characterized in that: said main section and secondary section are coupled rotationally by interposition of transmission means which comprise a first epicyclic stage which is provided with a first sun gear rotationally actuated by said main section and a first annular element that is integral with said containment body, between which multiple first planetary gears are interposed which are supported rotationally by a first planet carrier, and a second epicyclic stage which is provided with a second planet carrier which is rotationally actuated by said first planet carrier and supports a plurality of second planetary gears which are interposed between a second annular element, which can be actuated rotationally about said longitudinal axis, and a second sun gear, which is coupled rotationally to said secondary section, the rotational actuation of the second annular element being adapted to vary continuously the relative angular position of the secondary section with respect to the main section and therefore the angular offset of the corresponding eccentric masses during the rotation of said sections. said main section and secondary section are coupled rotationally by interposition of transmission means which comprise a first epicyclic stage which is provided with a first sun gear rotationally actuated by said main section and a first annular element that is integral with said containment body, between which multiple first planetary gears are interposed which are supported rotationally by a first planet carrier, and a second epicyclic stage which is provided with a second planet carrier which is rotationally actuated by said first planet carrier and supports a plurality of second planetary gears which are interposed between a second annular element, which can be actuated rotationally about said longitudinal axis, and a second sun gear, which is coupled rotationally to said secondary section, the rotational actuation of the second annular element being adapted to vary continuously the relative angular position of the secondary section with respect to the main section and therefore the angular offset of the corresponding eccentric masses during the rotation of said sections.