Parliamentary elections were held in Greece on 20 November 1977.^[1] After Prime Minister Constantine Karamanlis called for early elections, his New Democracy party suffered a significant loss of power. However, Karamanlis managed to secure an absolute majority in the Parliament. The big surprise was the success of PASOK, whose socialistic rhetoric remained radical. Because of PASOK's success, the Centrists (Union of the Democratic Centre, EDIK, former Center Union - New Forces) led again by Georgios Mavros) lost half of their power. As a result, Andreas Papandreou, PASOK's leader, became a prominent figure in Greek politics. The Communists (Communist Party of Greece) and the Nationalists managed to amplify their support.

1977 Greek legislative election

← 1974 20 November 1977 1981 →
All 300 seats in the Hellenic Parliament 151 seats needed for a majority
First party Second party Third party   Leader Constantine Karamanlis Andreas Papandreou Georgios Mavros Party ND PASOK EDIK Last election 54.37%, 220 seats 13.58%, 12 seats, 20.42%, 60 seats Seats won 171 93 16 Seat change 49 81 44 Popular vote 2,146,365 1,300,025 612,782 Percentage 41.84% 25.34% 11.95% Swing 12.53pp 11.76pp 8.47pp   Fourth party Fifth party Sixth party   Leader Charilaos Florakis Stefanos Stefanopoulos Ilias Iliou Party KKE National Alignment SPAD Last election 9.47%, 8 seats – Seats won 11 5 2 Seat change 3 New Popular vote 480,272 349,988 139,356 Percentage 9.36% 6.82% 2.72% Swing 0.11pp New   Seventh party   Leader Constantine Mitsotakis Party Party of New Liberals Last election – Seats won 2 Seat change New Popular vote 55,494 Percentage 1.08% Swing New
Prime Minister before election Constantine Karamanlis ND Prime Minister after election Constantine Karamanlis ND

Future Prime Minister of Greece, Antonis Samaras first won a seat in parliament at this election.