An apparatus for cutting an electrode sheet, the apparatus comprising: a transfer unit transferring the electrode sheet, in which a plurality of notching grooves are formed in a side surface thereof, up to a cutting point via a measuring point, so that, when the notching groove, which is disposed at a front end, of the notching grooves formed in the electrode sheet passes through the cutting point, the notching groove, which is disposed in a rear end of the front notching groove, passes through the measuring point; a detection unit provided at the measuring point to detect the notching groove of the electrode sheet, which passes through the measuring point, thereby generating a notching groove detection signal; and a cutting unit provided at the cutting point to cut the electrode sheet, in which the notching groove passing through the cutting point is disposed, according to the notching groove detection signal generated by the detection unit; wherein the detection unit comprises a line sensor installed in a direction perpendicular to a transfer direction of the electrode sheet to detect the notching groove of the electrode sheet passing through the measuring point and thereby to generate the notching groove detection signal, wherein the line sensor comprises a plurality of light receiving elements, the plurality of light receiving elements detects the notching groove through a variation in transmittance, which occurs when the notching groove of the electrode sheet passes through the measuring point; wherein the notching groove comprises first and second notching grooves, respectively formed in both side surfaces of the electrode sheet to face each other, and the line sensor comprises first and second line sensors (122a, 122b) to detect the first and second notching grooves (11a, 11b). a transfer unit transferring the electrode sheet, in which a plurality of notching grooves are formed in a side surface thereof, up to a cutting point via a measuring point, so that, when the notching groove, which is disposed at a front end, of the notching grooves formed in the electrode sheet passes through the cutting point, the notching groove, which is disposed in a rear end of the front notching groove, passes through the measuring point; a detection unit provided at the measuring point to detect the notching groove of the electrode sheet, which passes through the measuring point, thereby generating a notching groove detection signal; and a cutting unit provided at the cutting point to cut the electrode sheet, in which the notching groove passing through the cutting point is disposed, according to the notching groove detection signal generated by the detection unit; wherein the detection unit comprises a line sensor installed in a direction perpendicular to a transfer direction of the electrode sheet to detect the notching groove of the electrode sheet passing through the measuring point and thereby to generate the notching groove detection signal, wherein the line sensor comprises a plurality of light receiving elements, the plurality of light receiving elements detects the notching groove through a variation in transmittance, which occurs when the notching groove of the electrode sheet passes through the measuring point; wherein the notching groove comprises first and second notching grooves, respectively formed in both side surfaces of the electrode sheet to face each other, and the line sensor comprises first and second line sensors (122a, 122b) to detect the first and second notching grooves (11a, 11b).