The malarial parasite, Plasmodium vivax, was detected in 4 species of Anopheles (Hyrcanus Group) mosquitoes, namely An. kleini, An. pullus, An. belenrae, and An. sinensis, from Gyeonggi Province, Republic of Korea (ROK). This study confirmed that An. belenrae was infected by P. vivax, and implicated this species as a potential vector of vivax malaria in the ROK.