A tamarind De-seeder machine comprising a frame (8), a pedal (1), a pedal rod (2) connecting the pedal with pinion-gear (3) mounted on a shaft (4), the shaft has a fly wheel (6) at the other end. The motion of pedal is transferred to fly wheel (6) and a drum (5). The drum is attached to the hopper shaft (4) with a key. A concave is fixed to the frame and warps around the drum for 225°. A hopper (7) is fed with tamarind. Tamarind de-seeding exposes the seed while the drum (5) is rotating. The concave surface (11) presses the tamarind berry for exposing the seeds when the set of pegs rotating on a separate drum are disposed for knocking down the seeds for collection.