Most Ven. Kadawedduwe Sri Jinavamsa Maha Thera (April 1, 1907 – July 13, 2003) (Pali: Siri Jinavaṃsa, sometimes spelled Jinawansa, Sinhala: අති පූජ්ය කඩවැද්දූවේ ශ්රී ජිනවංශ මහා ථේර) was a Sri Lankan (Sinhalese) Bhikkhu (Buddhist monk). He was the founder of Sri Kalyani Yogasrama Samstha, a reform movement within the Sri Lankan Rāmañña Nikāya.