The Joint Opposition (Sinhala: ඒකාබද්ධ විපක්ෂය, romanized: Ekabadda Vipakshaya; Tamil: கூட்டு எதிர்ப்பு, romanized: Kuttu Etiruppu) was a political alliance formed by a faction of the Sri Lanka Freedom Party (SLFP) alongside several smaller quasi-left-wing parties of Sri Lanka.
Between 2015 and 2019, it was the largest opposition group in the Parliament of Sri Lanka, and at its maximum extent the alliance had 52 MPs.
The alliance aimed to give voice to the mandate voters provided for the UPFA at the 2015 general election, which many loyal SLFP members felt the party had abandoned when it joined the UNP-led government.
[1] The organization largely consisted of Mahinda Rajapaksa loyalists and was very critical of the administration of President Maithripala Sirisena and Prime Minister Ranil Wickremesinghe.
The Sri Lanka Podujana Peramuna, founded in 2016 and currently led by Rajapaksa, can be considered to be the alliance's spiritual successor.