Provided is a two-component mixing container (101) in which a communication passage may be formed between a partition wall member and a second-component containing member without the need for a high processing precision and a high assembly precision. A columnar portion (179) provided at the central portion of a second bottom wall portion (175) of a partition wall member (107) and a circular through hole (197) provided in the central portion of a third bottom wall portion (195) of a second-component containing member (109) are fitted. A first communication passage (187) and a second communication passage (198) may be brought into communication with each other, using a fitting surface formed between the columnar portion (175) and the circular through hole (197).
