The egg parasitoid complex of the pine processionary moth ( Thaumetopoea pityocampa ) was surveyed for the first time on the Thasos Island, Greece. A total of 96 egg batches containing 20391 eggs were collected between 06 and 10 of September, 2017 from Aleppo pines ( Pinus halepensis ) at four sites (Skidia, Thimonia, Alyki and Panagia). Four primary parasitoids were identified ( Ooencyrtus pityocampae , Baryscapus servadeii , Anastatus bifasciatus and Trichogramma sp.), as well as the hyperparasitoid B. transversalis . Among the parasitoids groups, O. pityocampae was the most common, followed by B. servadeii , whilst the number of other species was low. The highest survival rate was reported for three species: O. pityocampae , B. servadeii and A. bifasciatus , while the highest was the mortality in Trichogramma sp. All emerged adults of O. pityocampae and B. servadeii were female specimens and in A. bifasciatus - males. The number of females of B. transversalis was three times higher than the one of males. Ooencyrtus pityocampae and B. servadeii were the most important parasitoids of T. pityocampa , destroying respectively 27.1% and 9.9% of the host eggs.