Sinoburius is an extinct genus of xandarellid artiopodan known from the Cambrian aged Chengjiang Biota of China.

[1] It is a rare fossil within the Chengjiang assemblage.

Like other Xandarellids, Sinoburius has an unmineralised exoskeleton.

Adult individuals are around 7-8 millimetres in length, with stalked eyes present on the ventral side.

Unusually among artiopods, the antennae are strongly reduced in size.