Showa Aircraft Industry Co., Ltd. (昭和飛行機工業株式会社, Shōwa Hikōki Kōgyō Kabushiki-gaisha) is a Japanese company.

Its headquarters are at Akishima-shi, Tokyo Prefecture, a region of Tokyo Metropolis.

It was established in 1937 as a manufacturer of military aircraft in Akishima-shi.

In World War II it was one of two companies manufacturing the Showa/Nakajima L2D, a license-built Douglas DC-3 variant.

It also manufactured other military aircraft.