To provide an industrially advantageous method for producing a high purity 4,4'-dicarboxy-2,2'-bipyridine.

The invention relates to the method for producing 4,4'-dicarboxy-2,2'-bipyridine comprising a coupling reaction of 2-halogeno-pyridines expressed by formula (1) in a basic condition, and then adjusting pH of the obtained reaction mixture with an acid to 4-6 to precipitate the 4,4'-dicarboxy-2,2'-bipyridine. The invention relates to the method for purifying 4,4'-dicarboxy-2,2'-bipyridine containing isonicotinic acid comprises preparation of a basic aqueous solution of the 4,4'-dicarboxy-2,2'-bipyridine, precipitation of the 4,4'-dicarboxy-2,2'-bipyridine by adjusting pH of the basic aqueous solution with an acid to 4-6.