Officials said the two were arrested inside Lam Klong Ngu National Park, Thong Pha Phum district at 3pm on Thursday.
They were named as Lin, 38 and a 14-year-old boy, who live in a border village in Tambon Tha Khanoon, Thong Pha Phum.
The officials seized the carcass of a slow loris, and six squirrel carcasses. The animals’ internal organs had been removed and the carcasses preserved by being baked dry.
The authorities also seized two homemade rifles, a knife and two hammocks.