Namtok Phlio National Park () is a national park in Chanthaburi Province, Thailand. The park is home to forested mountains, waterfalls, and many stupas and chedis from the reign of King Rama V. The mountains here are also known as Khao Sa Bap, a mountainous fragment of the western ends of the much larger Cardamom Mountains. The Sa Bap mountains are heavily eroded karst, rising to no more than 673 metres.