A new rice insect pest was sighted in some rice producing areas of South Sulawesi Province, Indonesia. This pest is rice black bugs Paraeucosmetus pallicornis. The research aimed to isolation of fungi associated with rice black bugs Paraeucosmetus pallicornis, so as to know the cause of a bitter taste to the rice. The isolation of the fungi consist of three kinds of treatment, namely rice black bugs without sterilization, with sterilization and rice black bugs cut and sterilized. The result showed that the treatment rice black bug without sterilization obtained three genera namely Fusarium sp, Penicillium sp, and Aspergillus sp. In the treatment of rice black bug with sterilization obtained also three genera of fungi, as well as in the treatment of rice black bugs cut and sterilized, respectively Metarizium sp, Aspergillus sp, and Penicillium sp. as son as Trichoderma sp, Penicillium sp, and Aspergillus sp.