四苯甲烷（英文：Tetraphenylmethane）是甲烷的四个氢都被苯基取代后形成的有机化合物，于1898年由摩西·冈伯格（Moses Gomberg）首次制得。

冈伯格的合成路线为：

硝酸硝化四苯甲烷得到6。强碱与硝化的三苯甲烷类化合物次甲基中的质子反应，产物为深色的硝化三苯甲基负离子。

锌在冰醋酸中还原硝化的四苯甲烷，得到无色的7，而7在盐酸和铂存在下反应，生成苯胺9和染料碱性品红8。

不能通过四氯化碳与苯的傅-克反应制备四苯甲烷，可能是由于空间位阻造成的。

Tetraphenylmethane is an organic compound consisting of a methane core with four phenyl substituents. It was first synthesized by Moses Gomberg in 1898.

Gomberg's classical organic synthesis in scheme 1 starts by reacting triphenylmethylbromide 1 with phenylhydrazine 2 to the hydrazine 3. Oxidation with nitrous acid then produces the azo compound 4 from which on heating above the melting point, nitrogen gas evolves with formation of tetraphenylmethane 5.