To provide a harness piping annexing structure for a bus reduced in work load of annexing works and maintenance works of a harness and a cooler piping and having excellent workability.

This structure has a ceiling 10 in which a side part 10B is extended in vehicle body front and rear directions on an upper side of a side window by being curved downward, a cooler duct 20 in which an outside surface 20a is opposed to the side part 10B and a cover 45 mounted removably in the vicinity of a lower end of the side part 10B and on the cooler duct 20. The harness 31 and the cooler piping 32 are laid within a space part 25 formed between the side part 10B and the outside surface 20a. The harness 31 and the cooler piping 32 can be annexed from a lower side within the space part 25 and works are efficiently performed. By removing the cover 45, the harness 31 and the cooler piping 32 can be visually confirmed and replacing works of the harness 31 and the cooler piping 32 become easy.