A magnetic contactor comprising: a frame configured to include a fixed contact; a holder movably provided in the frame, and configured to include a movable contact which is contactable with the fixed contact; a movable core coupled to the holder to interoperate with the holder; a bobbin fixed to and provided in the frame, and configured to include a coil; a fixed core coupled to a side of the bobbin, and configured to absorb the movable core with a magnetic force; an elastic member provided between the holder and the bobbin; a b-contact switch configured to sense a closing completion time of the movable contact by using a mechanical mechanism relationship with the movable core; an electronic circuit part configured to receive a sensing signal from the b-contact switch and limit a current applied to the coil; and a switch manipulation member provided at one end of the movable core, and configured to operate the b-contact switch, characterized in that the switch manipulation member comprises: a switch manipulation body; a switch manipulation part provided to protrude at an end of one side of the switch manipulation body, and disposed to be separated from the b-contact switch with an interval in a moving direction of the movable core; and a switch manipulation projection formed at the switch manipulation part to protrude toward the b-contact switch, wherein the electronic circuit part is provided at a width-direction side of the bobbin in parallel with a moving direction of the movable core, and the b-contact switch is disposed at an end of one side of the electronic circuit part and on a moving line of the switch manipulation member. a frame configured to include a fixed contact; a holder movably provided in the frame, and configured to include a movable contact which is contactable with the fixed contact; a movable core coupled to the holder to interoperate with the holder; a bobbin fixed to and provided in the frame, and configured to include a coil; a fixed core coupled to a side of the bobbin, and configured to absorb the movable core with a magnetic force; an elastic member provided between the holder and the bobbin; a b-contact switch configured to sense a closing completion time of the movable contact by using a mechanical mechanism relationship with the movable core; an electronic circuit part configured to receive a sensing signal from the b-contact switch and limit a current applied to the coil; and a switch manipulation member provided at one end of the movable core, and configured to operate the b-contact switch, characterized in that the switch manipulation member comprises: a switch manipulation body; a switch manipulation part provided to protrude at an end of one side of the switch manipulation body, and disposed to be separated from the b-contact switch with an interval in a moving direction of the movable core; and a switch manipulation projection formed at the switch manipulation part to protrude toward the b-contact switch, a switch manipulation body; a switch manipulation part provided to protrude at an end of one side of the switch manipulation body, and disposed to be separated from the b-contact switch with an interval in a moving direction of the movable core; and a switch manipulation projection formed at the switch manipulation part to protrude toward the b-contact switch, wherein the electronic circuit part is provided at a width-direction side of the bobbin in parallel with a moving direction of the movable core, and the b-contact switch is disposed at an end of one side of the electronic circuit part and on a moving line of the switch manipulation member.