A resin sealing device for manufacturing a magnet embedded core including a laminated iron core having magnet insertion holes formed therein, each magnet insertion hole being provided with an opening at least at one of end surfaces of the laminated iron core, and a magnet piece inserted in each magnet insertion hole and sealed by resin charged into the magnet insertion hole, the resin sealing device comprising: a fixed platen; a moveable platen placed opposite to the fixed platen so as to be moveable in a direction toward and away from the fixed platen; a die clamping device configured to drive the moveable platen in the direction toward and away from the fixed platen; a fixed die attached to the fixed platen; and a moveable die attached to the moveable platen, wherein one of the fixed die and the moveable die is configured to place the laminated iron core thereon, and the other of the fixed die and the moveable die is configured to abut onto the end surface of the laminated iron core upon clamping by the die clamping device to close the openings of the magnet insertion holes and pressurize the laminated iron core in a laminating direction, the resin sealing device further comprising an elastic member positioned between the fixed die or the fixed platen and the moveable die or the moveable platen to urge the fixed die and the moveable die away from each other during the clamping by the die clamping device; characterized in that the resin sealing device further comprises: a tubular member having an axial direction coinciding with the direction toward and away from the fixed platen and projecting from one of the moveable die or the moveable platen and the fixed die or the fixed platen toward the other; and a moveable member provided on the tubular member so as to be moveable in the axial direction relative to the tubular member, wherein the elastic member comprises a compression coil spring positioned in the tubular member to urge the moveable member toward the other of the moveable die or the moveable platen and the fixed die or the fixed platen, and the moveable member includes a tip end portion configured to abut the other of the moveable die or the moveable platen and the fixed die or the fixed platen during a movement of the moveable die toward the fixed die. a fixed platen; a moveable platen placed opposite to the fixed platen so as to be moveable in a direction toward and away from the fixed platen; a die clamping device configured to drive the moveable platen in the direction toward and away from the fixed platen; a fixed die attached to the fixed platen; and a moveable die attached to the moveable platen, wherein one of the fixed die and the moveable die is configured to place the laminated iron core thereon, and the other of the fixed die and the moveable die is configured to abut onto the end surface of the laminated iron core upon clamping by the die clamping device to close the openings of the magnet insertion holes and pressurize the laminated iron core in a laminating direction, the resin sealing device further comprising an elastic member positioned between the fixed die or the fixed platen and the moveable die or the moveable platen to urge the fixed die and the moveable die away from each other during the clamping by the die clamping device; characterized in that the resin sealing device further comprises: a tubular member having an axial direction coinciding with the direction toward and away from the fixed platen and projecting from one of the moveable die or the moveable platen and the fixed die or the fixed platen toward the other; and a moveable member provided on the tubular member so as to be moveable in the axial direction relative to the tubular member, wherein the elastic member comprises a compression coil spring positioned in the tubular member to urge the moveable member toward the other of the moveable die or the moveable platen and the fixed die or the fixed platen, and the moveable member includes a tip end portion configured to abut the other of the moveable die or the moveable platen and the fixed die or the fixed platen during a movement of the moveable die toward the fixed die. a tubular member having an axial direction coinciding with the direction toward and away from the fixed platen and projecting from one of the moveable die or the moveable platen and the fixed die or the fixed platen toward the other; and a moveable member provided on the tubular member so as to be moveable in the axial direction relative to the tubular member, wherein the elastic member comprises a compression coil spring positioned in the tubular member to urge the moveable member toward the other of the moveable die or the moveable platen and the fixed die or the fixed platen, and the moveable member includes a tip end portion configured to abut the other of the moveable die or the moveable platen and the fixed die or the fixed platen during a movement of the moveable die toward the fixed die.