A release type electromagnetic device comprising: a bobbin in which a through hole is provided in a central portion , and an electromagnetic coil is mounted on the outer peripheral surface of the central portion between a first bobbin frame body and a second bobbin frame body ; a transfer yoke arranged on the second bobbin frame body side of said bobbin ; a permanent magnet arranged on said transfer yoke ; a yoke in which said bobbin , said electromagnetic coil , said transfer yoke , and said permanent magnet are contained in an inner space; an insertion pipe inserted in the through hole of said bobbin ; a plunger which is inserted in the inner periphery of said insertion pipe , and moves in a direction of coming into contact with or separating from said transfer yoke ; and a release spring which biases said plunger in the direction of separating from said transfer yoke , said plunger being retained at a position coming into contact with said transfer yoke by the suction force of said permanent magnet , and being released in the direction of separating from said transfer yoke by the biasing force of said release spring when said electromagnetic coil is energized to reduce the suction force of said permanent magnet , wherein said yoke includes: a plunger pass-through side yoke body which is located on the first bobbin frame body side of said bobbin and has a through hole (101a1) communicated with the through hole of said bobbin , central side yoke bodies each of which is bent from said plunger pass-through side yoke body to the permanent magnet side, and permanent magnet side yoke bodies each of which is bent from each of said central side yoke bodies to the center side of the through hole of said bobbin to come into contact with said permanent magnet and to form a yoke closing portion at respective end surfaces (101c1) of said permanent magnet side yoke bodies , and wherein one side of said insertion pipe faces said transfer yoke with a predetermined distance. a bobbin in which a through hole is provided in a central portion , and an electromagnetic coil is mounted on the outer peripheral surface of the central portion between a first bobbin frame body and a second bobbin frame body ; a transfer yoke arranged on the second bobbin frame body side of said bobbin ; a permanent magnet arranged on said transfer yoke ; a yoke in which said bobbin , said electromagnetic coil , said transfer yoke , and said permanent magnet are contained in an inner space; an insertion pipe inserted in the through hole of said bobbin ; a plunger which is inserted in the inner periphery of said insertion pipe , and moves in a direction of coming into contact with or separating from said transfer yoke ; and a release spring which biases said plunger in the direction of separating from said transfer yoke , said plunger being retained at a position coming into contact with said transfer yoke by the suction force of said permanent magnet , and being released in the direction of separating from said transfer yoke by the biasing force of said release spring when said electromagnetic coil is energized to reduce the suction force of said permanent magnet , wherein said yoke includes: a plunger pass-through side yoke body which is located on the first bobbin frame body side of said bobbin and has a through hole (101a1) communicated with the through hole of said bobbin , central side yoke bodies each of which is bent from said plunger pass-through side yoke body to the permanent magnet side, and permanent magnet side yoke bodies each of which is bent from each of said central side yoke bodies to the center side of the through hole of said bobbin to come into contact with said permanent magnet and to form a yoke closing portion at respective end surfaces (101c1) of said permanent magnet side yoke bodies , and wherein one side of said insertion pipe faces said transfer yoke with a predetermined distance. <EOS>