A switching device of low power consumption type, in which magnetic pole portions 37c of a pair of iron cores 37 constructing an electromagnet block 30 are individually arranged on the bottom face of a sealing case 41. The other end portions of the paired iron cores 37 are connected to each other by a yoke 39. As the electromagnet block 30 is magnetized and demagnetized, the two end portions of a moving iron member 63 of a contact mechanism block 50 are attracted by and leave the paired magnetic pole portions 37c of the iron cores 37.