Marumba gaschkewitschii is a species of moth of the family Sphingidae first described by Otto Vasilievich Bremer and William (Wasilii) Grey in 1853.

Adults are on wing from mid-May to late August in Korea.

Larvae have been recorded on Eriobotrya japonica and various Malus, Prunus and Pyrus species.

Most host plants are from the family Rosaceae, but there are also records for subspecies M. g. irata feeding on Salix.

There are also confirmed records on Ziziphus mauritiana and Prunus armeniaca.