A temperature sensitive pellet type thermal fuse comprises: a metal case having an open end and a bottom at the opposite end; a first lead wire connected to the bottom of the case to electrically connect to the case; a second lead wire fixed to the open end of the case so as to be insulated from the case by an insulating bush and having a fixed contact point (L2a) on an end placed inside the insulating bush; a temperature sensitive pellet installed in the case in such a manner that the pellet maintains a predetermined height below a fuse cutoff operation temperature and melts above the fuse cutoff operation temperature; a fixed terminal having a through hole with an inner wall, the fixed terminal being fixed on the inner wall of the case so as to be electrically connected to the case; a movable terminal movably installed in the case and operating in such a manner that below a fuse cutoff operation temperature, the movable terminal being in contact with the fixed contact point (L2a) of the second lead wire and with the fixed terminal to electrically connect the second lead wire with the case, and above the fuse cutoff operation temperature, the movable terminal being in contact with the case but separated from the fixed contact point (L2a) of the second lead wire to electrically disconnect the second lead wire from the case; a first spring biasing the movable terminal so as to render the movable terminal in contact with the second lead wire below the fuse cutoff operation temperature; and a second spring biasing the movable terminal in the direction to separate the movable terminal from the second lead wire, characterized in that, the movable terminal has a movable contact element at a lower end, the movable contact element slidably contacting with the inner wall of the through hole of the fixed terminal to electrically connect to the fixed terminal and having a bottom attached to a lower end of the movable terminal and a movable contact plate, the movable contact plate obliquely extended upwardly from a circumferential edge of the bottom and slidably contacting with an edge of the inner wall of the through hole of the fixed terminal to form movable contact point on the outer surface thereof, wherein the largest diameter at the upper end of the movable contact plate is configured to be smaller than the inner diameter of the case and larger than a diameter of the through hole of the fixed terminal, and the smallest diameter at the bottom of the movable contact plate being configured to be smaller than the diameter of the through hole of the fixed terminal. a metal case having an open end and a bottom at the opposite end; a first lead wire connected to the bottom of the case to electrically connect to the case; a second lead wire fixed to the open end of the case so as to be insulated from the case by an insulating bush and having a fixed contact point (L2a) on an end placed inside the insulating bush; a temperature sensitive pellet installed in the case in such a manner that the pellet maintains a predetermined height below a fuse cutoff operation temperature and melts above the fuse cutoff operation temperature; a fixed terminal having a through hole with an inner wall, the fixed terminal being fixed on the inner wall of the case so as to be electrically connected to the case; a movable terminal movably installed in the case and operating in such a manner that below a fuse cutoff operation temperature, the movable terminal being in contact with the fixed contact point (L2a) of the second lead wire and with the fixed terminal to electrically connect the second lead wire with the case, and above the fuse cutoff operation temperature, the movable terminal being in contact with the case but separated from the fixed contact point (L2a) of the second lead wire to electrically disconnect the second lead wire from the case; a first spring biasing the movable terminal so as to render the movable terminal in contact with the second lead wire below the fuse cutoff operation temperature; and a second spring biasing the movable terminal in the direction to separate the movable terminal from the second lead wire, characterized in that, the movable terminal has a movable contact element at a lower end, the movable contact element slidably contacting with the inner wall of the through hole of the fixed terminal to electrically connect to the fixed terminal and having a bottom attached to a lower end of the movable terminal and a movable contact plate, the movable contact plate obliquely extended upwardly from a circumferential edge of the bottom and slidably contacting with an edge of the inner wall of the through hole of the fixed terminal to form movable contact point on the outer surface thereof, wherein the largest diameter at the upper end of the movable contact plate is configured to be smaller than the inner diameter of the case and larger than a diameter of the through hole of the fixed terminal, and the smallest diameter at the bottom of the movable contact plate being configured to be smaller than the diameter of the through hole of the fixed terminal.