The present invention provides a discharge device for the raw materials of a beverage, wherein the seal opening part of a bag container is forcibly opened and raw materials are stably discharged out of the bag container. During the modulation process of the beverage, an elongated bag container (B), wherein the raw materials (G) of the beverage are sealed inside the bag container, is kept in the upright state and then the sealed upper end portion of the bag container is opened. The bag container (B) is rotated with a horizontal axis as a rotation center thereof, and then is turned upside down. In this way, raw materials are discharged downwardly through the seal-opened part of the bag container (B), namely the unsealed part of the bag container (B). The discharge device for the raw materials of the beverage comprises an opening device (110) for forcibly opening the sealed part of the bag container (B) when the bag container is turned upside down. In addition, the opening device (110) comprises two opening arms (111, 112) for opening the sealed part of the bag container (B) through pressing the two sides of the bag container in a predetermined direction.