An electromagnetic clutch device configured to connect a first rotational member to a second rotational member in a torque transmittable manner, the electromagnetic clutch device characterized by comprising: a meshing member (2, 2A) including a second meshing portion to be meshed with a first meshing portion formed in the first rotational member (11, 11A), the meshing member (2, 2A) being connected to the second rotational member in an axially movable but relatively non-rotatable manner; an electromagnetic coil that causes a magnetic force by current application; an armature that axially moves due to the magnetic force; a cylindrical cam member that axially moves the meshing member (2, 2A) so that the second meshing portion is meshed with the first meshing portion; and locking portions provided so as to be axially immovable relative to the first rotational member (11, 11A) and to be non-rotatable relative to the armature, wherein: the cam member is provided with a plurality of locked portions (51, 52, 81, 82, 83, 84) to be locked by the locking portions at different axial positions, such that the plurality of locked portions (51, 52, 81, 82, 83, 84) are formed adjacent to each other in a circumferential direction; the cam member rotates only by a first predetermined angle due to an axial movement of the armature from a first position to a second position, and the cam member further rotates only by a second predetermined angle due to a movement of the armature from the second position to the first position; and when locking of the locking portions is shifted from one of the plurality of locked portions (51; 81) to another locked portions (52; 82, 83, 84) circumferentially adjacent thereto so that the locking portions lock the another locked portions (52; 82, 83, 84) at a different axial position, the second meshing portion is meshed with the first meshing portion. a meshing member (2, 2A) including a second meshing portion to be meshed with a first meshing portion formed in the first rotational member (11, 11A), the meshing member (2, 2A) being connected to the second rotational member in an axially movable but relatively non-rotatable manner; an electromagnetic coil that causes a magnetic force by current application; an armature that axially moves due to the magnetic force; a cylindrical cam member that axially moves the meshing member (2, 2A) so that the second meshing portion is meshed with the first meshing portion; and locking portions provided so as to be axially immovable relative to the first rotational member (11, 11A) and to be non-rotatable relative to the armature, wherein: the cam member is provided with a plurality of locked portions (51, 52, 81, 82, 83, 84) to be locked by the locking portions at different axial positions, such that the plurality of locked portions (51, 52, 81, 82, 83, 84) are formed adjacent to each other in a circumferential direction; the cam member rotates only by a first predetermined angle due to an axial movement of the armature from a first position to a second position, and the cam member further rotates only by a second predetermined angle due to a movement of the armature from the second position to the first position; and when locking of the locking portions is shifted from one of the plurality of locked portions (51; 81) to another locked portions (52; 82, 83, 84) circumferentially adjacent thereto so that the locking portions lock the another locked portions (52; 82, 83, 84) at a different axial position, the second meshing portion is meshed with the first meshing portion. the cam member is provided with a plurality of locked portions (51, 52, 81, 82, 83, 84) to be locked by the locking portions at different axial positions, such that the plurality of locked portions (51, 52, 81, 82, 83, 84) are formed adjacent to each other in a circumferential direction; the cam member rotates only by a first predetermined angle due to an axial movement of the armature from a first position to a second position, and the cam member further rotates only by a second predetermined angle due to a movement of the armature from the second position to the first position; and when locking of the locking portions is shifted from one of the plurality of locked portions (51; 81) to another locked portions (52; 82, 83, 84) circumferentially adjacent thereto so that the locking portions lock the another locked portions (52; 82, 83, 84) at a different axial position, the second meshing portion is meshed with the first meshing portion.