The present invention relates to an electric saw 1 including: a body 100; a base 200 fixing a frame 410 of an elevating motion converting part 400 thereto; a forward and reverse rotation driving part 300 adapted to drive forward and reverse rotation of a DC motor 320; the elevating motion converting unit 400 adapted to move up and down an elevator 440 insertedly coupled movable up and down to left and right guides 412 and 412′ of the frame 410; and a saw part 500 having a ‘C’-shaped saw frame 510 having a fixing frame 510-1 adapted to fix one end of an upper frame 510-2 to the upper end thereof and to fix one end of a lower frame 510-3 to the lower end thereof and a plurality of elevator coupling holes 510-11 formed on the intermediate area thereof, the upper frame 510-2 adapted to fix the upper end of a saw blade 520 to the other end thereof, and the lower frame 510-3 adapted to fix the lower end of the saw blade 520 to the other end thereof, and the saw blade 520 fixed on both ends thereof to the other end of the upper frame 510-2 and to the other end of the lower frame 510-3.