Nieczajna [ɲɛˈt͡ʂai̯na] is a village in the administrative district of Gmina Oborniki, within Oborniki County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 9 kilometres (6 mi) south-west of Oborniki and 23 km (14 mi) north-west of the regional capital Poznań.