Lei Peifan (Chinese: 雷佩凡; born 31 May 2003) is a Chinese professional snooker player. While ranked 84th in the world, he won his first ranking event in December 2024, the 2024 Scottish Open, by defeating Wu Yize 9–5 in the final.
In May 2019, Lei came through Q School on the overall Order of Merit to earn a two-year card on the World Snooker Tour for the 2019–20 and 2020–21 seasons. He didn't retain his tour card after the end of the 2020–21 season but immediately gained a new two-year card for the 2021–22 and 2022–23 seasons by coming through Q School Event 3. In March 2024, by beating Australian Vinnie Calabrese from 5–3 down to win 6–5, Lei won the 2024 APSBF Asia Pacific Open Snooker Championship to earn another two-year card on the World Snooker Tour, starting from the 2024–25 season.
In December 2024, after never having advanced beyond the Last 16 of a professional tournament, Lei won the 2024 Scottish Open, defeating compatriot Wu Yize 9–5 in the final. It was only the fourth ever all-Chinese ranking event final and the second of the 2024–25 season (after the 2024 Wuhan Open). Ranked 84th in the world, he became the lowest-ranked player to win a ranking event since 93rd-ranked Dave Harold won the 1993 Asian Open. On his way to the final, he defeated Shaun Murphy, Stuart Bingham, Tom Ford and Mark Allen, all in . He advanced to a career high ranking of 43 in the world due to this win.