Chana Porpaoin (Thai: ชนะ ป.เปาอินทร์; born 1966-03-25 in Lom Sak District, Phetchabun Province, Thailand) is a Thai boxer. Chana and his younger brother, Songkram Porpaoin, became only the second set of twins to both capture world titles (the Galaxy twins were the first).

The professional ring name of the twins "Chana-Songkram" ("winning the war") comes from their supporter Prachuap Pao-in, at that time, was an investigative inspector at the Chana Songkram Metropolitan Police Station (located in the Bang Lamphu neighbourhood near Khaosan Road).

Chana has a real name Koon Motma (คูณ หมดมา; nicknamed: Thid; ถิด). He started boxing from Muay Thai in the name "Lomnua Sakchainarong" (ลมเหนือ ศักดิ์ชัยณรงค์) by fighting regularly at Rajadamnern Stadium and also won mini flyweight champion in 1988.^[1]

He turned professional in May 1988 under Niwat "Chae-mae" Laosuwanwat of Galaxy Boxing Promotion and captured the World Boxing Association (WBA) minimumweight title with a majority decision win over Hideyuki Ohashi in early 1993 at Tokyo Metropolitan Gymnasium, Tokyo, Japan. He defended the title against 8 fighters before losing it to Rosendo Álvarez in the late 1995 by split decision at Sa Kaeo Province, Thailand. He recaptured the belt in 2001 with a win over Keitaro Hoshino, but lost the belt in his first defense to Yutaka Niida.

In 2004, he challenged for the WBA interim minimumweight title twice again with Juan Jose Landaeta, but was not successful (including one draw).

He retired along with his brother Songkram. After retirement he opened a rice shop in Bang Yai District, Nonthaburi Province.^[1]

Chana is currently the owner of a Muay Thai gym named Chaosingkhon (จ้าวสิงห์ขร) at Pho Thale District, Phichit Province, after many careers. He trained many local youths to become professional Muay Thai kickboxers. As a result, these lads gave up their mischief teenage behavior.^[2]

• List of Mini-flyweight boxing champions