Zaduszniki [zaduʂˈniki] is a village in the administrative district of Gmina Padew Narodowa, within Mielec County, Subcarpathian Voivodeship, in south-eastern Poland. It lies approximately 5 kilometres (3 mi) north-west of Padew Narodowa, 21 km (13 mi) north of Mielec, and 62 km (39 mi) north-west of the regional capital Rzeszów.

Pharmacist and oil pioneer Ignacy Łukasiewicz (1822–1882) was born in Zaduszniki.