Maladera tiachiensis is a species of beetle of the family Scarabaeidae. It is found in China (Hainan) and Vietnam.
Adults reach a length of about 8.9âÂÂ9.4 mm. They have a dark brown, oval body. The antennae are yellow, dull, while the labroclypeus is shiny. The dorsal surface is nearly glabrous.
The species name refers to its type locality, Tiachin.