The diagnostic criteria for IgG4-related respiratory disease were proposed by the Subcommittee of Respiratory Disease of IgG4-related Disease supported by the Health and Labor Sciences Research Grants for the Study of Intractable Diseases from the Ministry of Health, Labour and Welfare, Japan. The criteria include the following 4 conditions: 1) image findings, 2) blood test findings, 3) pathological findings, and 4) presence of extra-thoracic organ lesions, and are classified in three stages of definite, probable, and possible according to combinations of the above conditions. Also, we added a commentary and algorithm to the diagnostic criteria. The criteria were presented in the symposium of the 54th Annual Meeting of the Japanese Respiratory Society (2014) and discussed by members of the respiratory society. The diagnostic criteria and algorithm will be useful for clarifying the entity of IgG4-related respiratory disease.