Salt derivative phenoxypyridine, or crystal thereof, and method of producing the same.

An acid addition salt of N- (2-fluoro-4 - {[2 - ({[4- (4-methylpiperazin-1-yl) piperidin-1-yl] carbonyl} amino) pyridin-4-yl] oxy} phenyl) -N '- (4-fluorophenyl) cyclopropane-1,1-dicarboxiamida, the acid selected from the group consisting of hydrochloric acid, hydrobromic acid, sulfuric acid, fumaric acid, succinic acid, malic acid, maleic acid and tartaric.