The purpose of the present invention is to provide a molded article that has high antimicrobial capability (antibacterial capability and anti-mold capability), and that contains a polymer-type antimicrobial agent, wherein elution of the polymer can be suppressed and the polymer-type antimicrobial agent has excellent antibacterial durability. The present invention is an antimicrobial agent containing a polymer having the structure unit represented by formula (1), where: R1 is a C3-24 alkylene group; R2 is selected from the group comprising a C2-24 alkyl group, a C3-12 alicyclic hydrocarbon group, and a C6-24 aryl group; and a secondary amino group represented by -NHR2 may be a neutralized salt.
