To allow injection of punctured-tire sealing material and pumping up in one operation for a high-pressure air source so as to improve operability substantially, and to reduce the size and cost by simplifying the structure of an outlet valve itself and the device.

This device has a pressure-resistant container 3 containing tire-puncture sealing material and an outlet valve 4 mounted on the upper end of the pressure-resistant container 3 and provided with an air intake port 6 communicating with high pressure air source and a discharge port 7 communicating with the tire. The outlet valve 4 is also provided with a discharge passage 22, made of a pipe-like portion 21 extending downward from the discharge port 7 to the vicinity of the bottom of the pressure-resistant container 3. Further, the valve is also provided with an annular air intake passage 23 extending downward from the air intake port 6 while surrounding the external periphery of the pipe-like portion 21.