An electrical connector, comprising: an insulative housing that is formed with a slot in which a tabular signal transmission member is fittable; a plurality of contacts each comprising an elastic conductor in a substantially H shape including a pair of beams (12a1-12a2, 12b1-12b2) and a pillar (12a3, 12b3) that connects the pair of beams (12a1-12a2, 12b1-12b2) with each other, the pair of beams (12al-12a2, 12b1-12b2) located at one-end side with reference to the pillar (12a3, 12b3) being disposed in the slot of the housing so as to correspond to respective electrodes of the signal transmission member fitted in the housing through the slot; and an actuator attached to the housing in a freely rotatable manner, including a shaft which is held between the pair of beams (12a1-12a2, 12b1-12b2) at an other-end side with reference to the pillar (12a3, 12b3), and which is rotatable around an axial center along with the rotation of the actuator, and enabling the plurality of contacts to contact the electrodes upon rotation of the shaft, the actuator comprising: an operation part to be rotated; tabular partitions having one end connected to the operation part and the other end connected to the shaft, the tabular partitions partition, for each beam located at a position that allows the beam to abut the actuator, a through-hole into which one of the pair of beams (12a1-12a2, 12b1-12b2) located at the other-end side at a position that allows the beam to abut the actuator, is inserted to prevent the beam from abutting the actuator; characterized in that a wider-width part (13g, 13h) including a wider-width surface is disposed at the one end or the other end of the tabular partition corresponding to an upstream side of a flow of resin flowed to mold the partition when the actuator is molded by the resin containing a filler, and the wider-width part (13g, 13h) has a width wider than the width of the tabular partition. an insulative housing that is formed with a slot in which a tabular signal transmission member is fittable; a plurality of contacts each comprising an elastic conductor in a substantially H shape including a pair of beams (12a1-12a2, 12b1-12b2) and a pillar (12a3, 12b3) that connects the pair of beams (12a1-12a2, 12b1-12b2) with each other, the pair of beams (12al-12a2, 12b1-12b2) located at one-end side with reference to the pillar (12a3, 12b3) being disposed in the slot of the housing so as to correspond to respective electrodes of the signal transmission member fitted in the housing through the slot; and an actuator attached to the housing in a freely rotatable manner, including a shaft which is held between the pair of beams (12a1-12a2, 12b1-12b2) at an other-end side with reference to the pillar (12a3, 12b3), and which is rotatable around an axial center along with the rotation of the actuator, and enabling the plurality of contacts to contact the electrodes upon rotation of the shaft, the actuator comprising: an operation part to be rotated; tabular partitions having one end connected to the operation part and the other end connected to the shaft, the tabular partitions partition, for each beam located at a position that allows the beam to abut the actuator, a through-hole into which one of the pair of beams (12a1-12a2, 12b1-12b2) located at the other-end side at a position that allows the beam to abut the actuator, is inserted to prevent the beam from abutting the actuator; characterized in that a wider-width part (13g, 13h) including a wider-width surface is disposed at the one end or the other end of the tabular partition corresponding to an upstream side of a flow of resin flowed to mold the partition when the actuator is molded by the resin containing a filler, and the wider-width part (13g, 13h) has a width wider than the width of the tabular partition. an operation part to be rotated; tabular partitions having one end connected to the operation part and the other end connected to the shaft, the tabular partitions partition, for each beam located at a position that allows the beam to abut the actuator, a through-hole into which one of the pair of beams (12a1-12a2, 12b1-12b2) located at the other-end side at a position that allows the beam to abut the actuator, is inserted to prevent the beam from abutting the actuator; characterized in that a wider-width part (13g, 13h) including a wider-width surface is disposed at the one end or the other end of the tabular partition corresponding to an upstream side of a flow of resin flowed to mold the partition when the actuator is molded by the resin containing a filler, and the wider-width part (13g, 13h) has a width wider than the width of the tabular partition.