Ji Woon-soo's Stroke of Luck (Korean: 지운수대통; RR: Ji Un-su Daetong) is a 2012 South Korean television series that aired on cable channel TV Chosun from April 21 to June 24, 2012, on Saturdays and Sundays at 18:50 for 20 episodes.

It marks film actor Im Chang-jung's first TV starring role in his 21-year career.

Ji Woon-soo is an average office worker who dreams of turning his life around.

He is unlucky at everything he does and is never proactive about anything.

Until one day, he experiences a stroke of extremely good luck and wins the lottery, going through the many ups and downs that follow.