A door god is a Chinese decoration placed on each side of an entry to a temple, home, business, etc., which is believed to keep evil spirits from entering.

The custom dates back to the Tang Dynasty, whose founder Emperor Tang Taizong (599 - May 26, 649) honoured two of his most loyal generals – Qin Shubao and Yuchi Jingde – by having their painted portraits hung on his front door. Ordinary families soon adopted the imperial custom, putting woodblock prints of the ever-vigilant generals on their front gates in the hope of attracting good luck and fending off evil spirits. The Door God business soon spread throughout China, adding other folklore heroes and mythological figures to the repertoire.

The door gods usually come in pairs, facing each other; it is considered bad luck to place the figures back-to-back. There are several different forms of door gods. The most frequently used are Qin Shubao and Yuchi Jingde (used on a pair of doors). The poster depicting Wei Zheng or Zhong Kui are used on single doors.