Smerinthus planus, the Oriental eyed hawkmoth, is a moth of the family Sphingidae.

It is found from northern Xinjiang across northern China, Mongolia and south-eastern Siberia to the Russian Far East and Japan, and then south through Korea and Taiwan to Hainan, Yunnan and eastern Tibet.

There are probably two generations per year in western China.

Depending on latitude and weather, there are between one and four generations further east in China, with adults on wing between April and September.

The larvae feed on Populus and Salix species.