Disclosed is a novel means of simultaneously detecting a human parvovirus B19 antigen and an IgM type anti-human parvovirus B19 antibody. The method of simultaneously detecting a human parvovirus B19 antigen and an IgM type anti-human parvovirus B19 antibody in a sample according to the present invention comprises bringing a sample into contact with (1) a 1st probe for detecting the parvovirus B19 antigen and (2) a 2nd probe for detecting the IgM type anti-parvovirus B19 antibody in the presence of a surfactant within the same reaction.
