A discharge container comprising: a container main body having an inner container configured to accommodate contents and deformed according to reduction of the contents, and an outer container in which the inner container is installed to be elastically deformed; a discharge cap mounted on a port section of the container main body, and having a discharge port configured to discharge the contents and a communication hole configured to bring the discharge port in communication with the inside of the inner container; wherein the discharge cap is constituted by: an outer tube body on the port section of the container main body; an inner support plug hermetically assembled to an opening end of the port section and formed in a tubular shape having a top section; and a valve body hermetically assembled and fixed to be sandwiched between the inner support plug and the outer tube body, wherein a suction hole configured to suction external air to a space between the inner container and the outer container (3, 202) is formed in the outer container; characterized in that the valve body comprises: an air valve configured to open toward the suction hole with a negative pressure generated between the outer container and the inner container and to switch between allowing and blocking communication between an outside of the discharge cap and the suction hole; and a discharge film elastically deformable to close the discharge port, wherein a slit (20a, 224) is formed in the discharge film (20, 223), and the slit (20a, 224) is widened and opened to open the discharge port as the discharge film (20, 223) is elastically deformed according to an increase in pressure inside the inner container (2, 203); wherein a top plate portion of the inner support plug disposed near the inside of the discharge film is configured such that a baffle plate piece having a beam plate piece shape remains to open the communication hole, and wherein the baffle plate piece is a suppressing section, the suppressing section configured to apply a suppressing force to a flow of the contents being disposed near the inside of the discharge film. a container main body having an inner container configured to accommodate contents and deformed according to reduction of the contents, and an outer container in which the inner container is installed to be elastically deformed; a discharge cap mounted on a port section of the container main body, and having a discharge port configured to discharge the contents and a communication hole configured to bring the discharge port in communication with the inside of the inner container; wherein the discharge cap is constituted by: an outer tube body on the port section of the container main body; an inner support plug hermetically assembled to an opening end of the port section and formed in a tubular shape having a top section; and a valve body hermetically assembled and fixed to be sandwiched between the inner support plug and the outer tube body, an outer tube body on the port section of the container main body; an inner support plug hermetically assembled to an opening end of the port section and formed in a tubular shape having a top section; and a valve body hermetically assembled and fixed to be sandwiched between the inner support plug and the outer tube body, wherein a suction hole configured to suction external air to a space between the inner container and the outer container (3, 202) is formed in the outer container; characterized in that the valve body comprises: an air valve configured to open toward the suction hole with a negative pressure generated between the outer container and the inner container and to switch between allowing and blocking communication between an outside of the discharge cap and the suction hole; and a discharge film elastically deformable to close the discharge port, an air valve configured to open toward the suction hole with a negative pressure generated between the outer container and the inner container and to switch between allowing and blocking communication between an outside of the discharge cap and the suction hole; and a discharge film elastically deformable to close the discharge port, wherein a slit (20a, 224) is formed in the discharge film (20, 223), and the slit (20a, 224) is widened and opened to open the discharge port as the discharge film (20, 223) is elastically deformed according to an increase in pressure inside the inner container (2, 203); wherein a top plate portion of the inner support plug disposed near the inside of the discharge film is configured such that a baffle plate piece having a beam plate piece shape remains to open the communication hole, and wherein the baffle plate piece is a suppressing section, the suppressing section configured to apply a suppressing force to a flow of the contents being disposed near the inside of the discharge film.