Fuente: WIPO "tomato" An object of the present invention is to provide, for example, an antibody that specifically binds to cat PD-1 and has action of inhibiting the binding between cat PD-1 and cat PD-L1. An antibody that specifically binds to cat PD-1 is obtained, the antibody comprising particular heavy chain complementarity-determining region (CDR) 1 to CDR3 and particular light chain CDR1 to CDR3.