To provide a tent causing no blocking of a flowing passage without bringing air columns into close contact with each other when exhausting air from the air columns.

In this tent for stretching a tent 3 over the plural air columns 2, a blocking-up preventive member 5 having flexibility in the lengthwise direction and having rigidity in the width direction, is arranged in the lengthwise direction of the air columns on the inside of the air columns. Thus, since the flexible blocking-up preventive member is fixed inside the air columns, this flexible blocking-up preventive member interferes and hinders close contact of mutual air column inner walls so that the air flowing passage can be secured, and air can be smoothly exhausted.