The Resava (Serbian Cyrillic: Ресава) is a river in central Serbia, a 65 km-long right tributary to the Velika Morava.

The Resava carved a 25 km-long and 400 m-deep gorge, with a central part of it representing a typical canyon valley, the Sklop.

In its lower course, the river creates a typical epigene gallery feature, between the hills of Pastorak (570 m) and Maćeha (Serbian for stepson and stepmother).

The river enters the Resava region and receives its major tributary, the Resavica from the left near the Dvorište village.

Resava-Morava Coal Mines (Resavsko-moravski ugljeni basen/Ресавско-моравски угљени басен) or shortly REMBAS (РЕМБАС) are located in the lower Resava river valley.