A method for diagnosing viral respiratory diseases, comprising (i) amplifying DNA or RNA in a sample isolated from a subject who has developed or is suspected of having the viral respiratory disease by using a primer set and probes selected from the following (a) to (e): (a) a primer set comprising a primer pair represented by SEQ ID Nos. 1 and 2, a primer pair represented by SEQ ID Nos. 3 and 4, and a primer pair represented by SEQ ID Nos. 5 and 6; and probes of SEQ ID Nos. 34, 35, and 36; (b) a primer set comprising a primer pair represented by SEQ ID Nos. 7 and 8, a primer pair represented by SEQ ID Nos. 9 and 10, and a primer pair represented by SEQ ID Nos. 11 and 12; and probes of SEQ ID Nos. 37, 38, and 39; (c) a primer set comprising a primer pair represented by SEQ ID Nos. 13 and 14, and a primer pair represented by SEQ ID Nos. 17 and 18; and probes of SEQ ID Nos. 40 and 42; (d) a primer set comprising a primer pair represented by SEQ ID Nos. 19 and 20, and a primer pair represented by SEQ ID Nos. 21 and 22; and probes of SEQ ID Nos. 43, and 44; and (e) a primer set comprising a primer pair represented by SEQ ID Nos. 25 and 26; and a primer pair composed of a forward primer having a nucleotide sequence selected from the group consisting of SEQ ID Nos. 27 to 29 and a reverse primer having a nucleotide sequence selected from the group consisting of SEQ ID Nos. 30 and 31; and probes of SEQ ID Nos.46 to 51; and (ii) detecting two or more types of viruses selected from the group consisting of corona virus 229E, corona virus OC43, corona virus NL63, parainfluenza virus 1, parainfluenza virus 2, parainfluenza virus 3, influenza A virus, influenza B virus, respiratory syncytial virus A, respiratory syncytial virus B, boca virus, adenovirus, rhino virus A, rhino virus B, rhino virus C, and metapneumovirus, simultaneously. (i) amplifying DNA or RNA in a sample isolated from a subject who has developed or is suspected of having the viral respiratory disease by using a primer set and probes selected from the following (a) to (e): (a) a primer set comprising a primer pair represented by SEQ ID Nos. 1 and 2, a primer pair represented by SEQ ID Nos. 3 and 4, and a primer pair represented by SEQ ID Nos. 5 and 6; and probes of SEQ ID Nos. 34, 35, and 36; (b) a primer set comprising a primer pair represented by SEQ ID Nos. 7 and 8, a primer pair represented by SEQ ID Nos. 9 and 10, and a primer pair represented by SEQ ID Nos. 11 and 12; and probes of SEQ ID Nos. 37, 38, and 39; (c) a primer set comprising a primer pair represented by SEQ ID Nos. 13 and 14, and a primer pair represented by SEQ ID Nos. 17 and 18; and probes of SEQ ID Nos. 40 and 42; (d) a primer set comprising a primer pair represented by SEQ ID Nos. 19 and 20, and a primer pair represented by SEQ ID Nos. 21 and 22; and probes of SEQ ID Nos. 43, and 44; and (e) a primer set comprising a primer pair represented by SEQ ID Nos. 25 and 26; and a primer pair composed of a forward primer having a nucleotide sequence selected from the group consisting of SEQ ID Nos. 27 to 29 and a reverse primer having a nucleotide sequence selected from the group consisting of SEQ ID Nos. 30 and 31; and probes of SEQ ID Nos.46 to 51; and (a) a primer set comprising a primer pair represented by SEQ ID Nos. 1 and 2, a primer pair represented by SEQ ID Nos. 3 and 4, and a primer pair represented by SEQ ID Nos. 5 and 6; and probes of SEQ ID Nos. 34, 35, and 36; (b) a primer set comprising a primer pair represented by SEQ ID Nos. 7 and 8, a primer pair represented by SEQ ID Nos. 9 and 10, and a primer pair represented by SEQ ID Nos. 11 and 12; and probes of SEQ ID Nos. 37, 38, and 39; (c) a primer set comprising a primer pair represented by SEQ ID Nos. 13 and 14, and a primer pair represented by SEQ ID Nos. 17 and 18; and probes of SEQ ID Nos. 40 and 42; (d) a primer set comprising a primer pair represented by SEQ ID Nos. 19 and 20, and a primer pair represented by SEQ ID Nos. 21 and 22; and probes of SEQ ID Nos. 43, and 44; and (e) a primer set comprising a primer pair represented by SEQ ID Nos. 25 and 26; and a primer pair composed of a forward primer having a nucleotide sequence selected from the group consisting of SEQ ID Nos. 27 to 29 and a reverse primer having a nucleotide sequence selected from the group consisting of SEQ ID Nos. 30 and 31; and probes of SEQ ID Nos.46 to 51; and (ii) detecting two or more types of viruses selected from the group consisting of corona virus 229E, corona virus OC43, corona virus NL63, parainfluenza virus 1, parainfluenza virus 2, parainfluenza virus 3, influenza A virus, influenza B virus, respiratory syncytial virus A, respiratory syncytial virus B, boca virus, adenovirus, rhino virus A, rhino virus B, rhino virus C, and metapneumovirus, simultaneously.