Cap unit provided with: cap body (7) having first-flow-channel (5) for feeding compressed air from compressor (3) into bottle container (4) and second-flow-channel (6) for sequentially providing puncture repair liquid (T) and compressed air from the bottle container; and first and second closing plugs (8A, 8B) independent from one another and closing both flow channels. Cap body (7) includes boss portion (11) on which is disposed first-closing-plug securing portion (11A) permitting elastic fitting of first-closing-plug disposed. Upper opening portion (5a) of first-flow-channel opens further inward than the first-closing-plug securing portion, and the upper opening portion of second-flow-channel opens further outward than the first-closing-plug securing portion. Second-closing-plug can be moved by hand and opens second-flow-channel by means of said movement. This reduces precision requirements when fitting a cap unit while ensuring the opening and closing of a first and second path.