The Xiaomen Geology Gallery () is a gallery in Xiaomen Village, Xiyu Township, Penghu County, Taiwan.
The gallery was opened in 2001.
The gallery is divided into eight sections, which are guide of Xiaomen Island, geomorphology of Penghu Islands, landscape model, rocks and minerals, ecology, marine ecology, culture of Xiaomen Island and showcase of specimens.
The gallery exhibits information, history and geological features of Penghu Islands.