Piper retrofractum, the Balinese long pepper or Javanese long pepper, is a flowering vine in the family Piperaceae, cultivated for its fruit, which is usually dried and used as a spice and seasoning.

This species is native to Java island in Indonesia.

[1][2] The plant is a climbing vine with stems of about 3–4 mm in diameter.

Its leaves have blades that are glabrous, lanceolate, with acuminate apex and asymmetric base, and are about 10–12 cm long and 3–3.5 cm wide.

Its berries are spherical and arranged densely on the axis.