A dispensing container (10, 50, 70) comprising: a container body having a flexible internal container which contains content and deforms so as to deflate with a decreasing amount of the content and an external container in which the internal container is attached, the external container being provided with a suction port for sucking external air in between the internal container and the external container; a discharge cap which is attached to a spout of the container body and provided with a discharge port for discharging the content; an external-air inlet port which communicates between outside and the suction port; an air valve which switches between a communicated state and a shutoff state of communication between the external-air inlet port and the suction port; and an inside plug member which closes the spout and which is provided with a communication port which communicates between the discharge port and the internal container, wherein a valve body is arranged and fitted in the communication port; wherein: the discharge cap includes the inside plug member and a cylindrical body member having a top-closed cylindrical shape, the cylindrical body member covering the inside plug member and being provided with the discharge port; and characterized in that: the valve body is arranged and fitted in the communication port so as to be slidable along an axial direction of the communication port, the valve body being elastically displaced along the axial direction so as to open and close the communication port and to suck external air to the discharge port when closing, due to an increase of an internal volume of an internal space communicating with the discharge port. a container body having a flexible internal container which contains content and deforms so as to deflate with a decreasing amount of the content and an external container in which the internal container is attached, the external container being provided with a suction port for sucking external air in between the internal container and the external container; a discharge cap which is attached to a spout of the container body and provided with a discharge port for discharging the content; an external-air inlet port which communicates between outside and the suction port; an air valve which switches between a communicated state and a shutoff state of communication between the external-air inlet port and the suction port; and an inside plug member which closes the spout and which is provided with a communication port which communicates between the discharge port and the internal container, wherein a valve body is arranged and fitted in the communication port; wherein: the discharge cap includes the inside plug member and a cylindrical body member having a top-closed cylindrical shape, the cylindrical body member covering the inside plug member and being provided with the discharge port; and characterized in that: the valve body is arranged and fitted in the communication port so as to be slidable along an axial direction of the communication port, the valve body being elastically displaced along the axial direction so as to open and close the communication port and to suck external air to the discharge port when closing, due to an increase of an internal volume of an internal space communicating with the discharge port. the discharge cap includes the inside plug member and a cylindrical body member having a top-closed cylindrical shape, the cylindrical body member covering the inside plug member and being provided with the discharge port; and the valve body is arranged and fitted in the communication port so as to be slidable along an axial direction of the communication port, the valve body being elastically displaced along the axial direction so as to open and close the communication port and to suck external air to the discharge port when closing, due to an increase of an internal volume of an internal space communicating with the discharge port.