Smin Sam Lek (Mon: သ္ငီသံလှေက်, Burmese: သမိန်သံလိုက်, Burmese pronunciation: [θəmèiɴ θàɴ laiʔ]; also spelled Thamein Than Laik; c.1340s – 1388) was viceroy-general of Donwun for the Hanthawaddy Kingdom from 1370/71 to 1388. Sam Lek was appointed to the office by King Binnya U of Hanthawaddy after he had recaptured Donwun, the ancestral home of the dynasty, for the king.