Maladera detersa is a species of beetle of the family Scarabaeidae. It is found in China (Guangdong, Guangxi) and Vietnam.
Adults reach a length of about 6.7-8.2 mm. They have an oval, reddish brown to yellowish brown body. The upper surface is strongly glossy and glabrous, except for a few individual hairs on the head, the lateral elytral intervals and the hairs along the lateral margin of the pronotum and elytra.