A nasal cannula including: a cannula body having a tubular shape, which is provided with a pair of paths through which respiration gas flows, and a partition wall which partitions the paths and makes outer sides of bent parts of the paths respectively a pair of introducing pipes which are formed integrally with the cannula body at both end parts of the cannula body so as to communicate with end parts of the paths respectively and to be connected to a pair of supply tubes supplying the respiration gas respectively and a pair of nasal pipes which are formed integrally with the cannula body at a center part of the cannula body so as to communicate with other end parts of the paths respectively, and to be inserted into nares.
