An apparatus for aligning and positioning a plurality of pieces of food dough on a conveyer (10, 20) at predetermined intervals and predetermined orientations, the apparatus comprising: an upstream conveyer configured to convey a plurality of pieces of food dough, which are cut from a sheet of food dough, so that specific sides of the pieces of food dough having a triangular shape become parallel to the moving direction of the conveyor; and a downstream conveyer disposed at the downstream side of the upstream conveyer, wherein the downstream conveyer is configured to move faster than the upstream conveyer; wherein the apparatus further comprises: a separating apparatus disposed above a connecting position of the upstream conveyer and the downstream conveyer, wherein the separating apparatus is configured to separate a plurality of the pieces of food dough set in a line in the perpendicular direction to the moving direction of the conveyer (10, 20) from the following row of the pieces of food dough, and to translocate a plurality of the pieces of food dough from the upstream conveyer to the downstream conveyer; and a laying-out and rotating apparatus disposed at the downstream side of the separating apparatus, and above the downstream conveyer, wherein the laying-out and rotating apparatus is configured to lay out and rotate a plurality of the pieces of food dough set in a line so as to position the plurality of the pieces of food dough at predetermined intervals in the perpendicular direction to the moving direction of the conveyer (20, 30) and to rotate the plurality of the pieces of food dough 90 degrees in a predetermined rotational direction; characterized in that a detecting device disposed between the separating apparatus and the laying-out and rotating apparatus, and above the downstream conveyer, wherein the detecting device is configured to detect the pieces of food dough and to identify the direction of the pieces of food dough and the position of the median lines of the pieces of dough for controlling the movement of the laying-out and rotating apparatus. an upstream conveyer configured to convey a plurality of pieces of food dough, which are cut from a sheet of food dough, so that specific sides of the pieces of food dough having a triangular shape become parallel to the moving direction of the conveyor; and a downstream conveyer disposed at the downstream side of the upstream conveyer, wherein the downstream conveyer is configured to move faster than the upstream conveyer; wherein the apparatus further comprises: a separating apparatus disposed above a connecting position of the upstream conveyer and the downstream conveyer, wherein the separating apparatus is configured to separate a plurality of the pieces of food dough set in a line in the perpendicular direction to the moving direction of the conveyer (10, 20) from the following row of the pieces of food dough, and to translocate a plurality of the pieces of food dough from the upstream conveyer to the downstream conveyer; and a laying-out and rotating apparatus disposed at the downstream side of the separating apparatus, and above the downstream conveyer, wherein the laying-out and rotating apparatus is configured to lay out and rotate a plurality of the pieces of food dough set in a line so as to position the plurality of the pieces of food dough at predetermined intervals in the perpendicular direction to the moving direction of the conveyer (20, 30) and to rotate the plurality of the pieces of food dough 90 degrees in a predetermined rotational direction; a separating apparatus disposed above a connecting position of the upstream conveyer and the downstream conveyer, wherein the separating apparatus is configured to separate a plurality of the pieces of food dough set in a line in the perpendicular direction to the moving direction of the conveyer (10, 20) from the following row of the pieces of food dough, and to translocate a plurality of the pieces of food dough from the upstream conveyer to the downstream conveyer; and a laying-out and rotating apparatus disposed at the downstream side of the separating apparatus, and above the downstream conveyer, wherein the laying-out and rotating apparatus is configured to lay out and rotate a plurality of the pieces of food dough set in a line so as to position the plurality of the pieces of food dough at predetermined intervals in the perpendicular direction to the moving direction of the conveyer (20, 30) and to rotate the plurality of the pieces of food dough 90 degrees in a predetermined rotational direction; characterized in that a detecting device disposed between the separating apparatus and the laying-out and rotating apparatus, and above the downstream conveyer, wherein the detecting device is configured to detect the pieces of food dough and to identify the direction of the pieces of food dough and the position of the median lines of the pieces of dough for controlling the movement of the laying-out and rotating apparatus.