Park Jung Min debuted with SS501 in 2005, and was the second to audition in the group. He has guested in variety shows in 2006, hosted radio program Youngstreet with Kim Kyu Jong and Heo Young Saeng. He is the low vocal of the group. He was the main character in a program TV called Human Theater 2010 as himself, Park Jung Min. He also had a TV show entitled What a Women Wants. He shared high school with fellow member Kim Hyung Jun at Dankook University.
Park Jung Min has worked in the musical Grease as lead role of 'Danny Park' for which he won the "Golden Ticket Award" for Best Musical New Talent over YeSung (Super Junior) in ‘NamHanSanSung' and other nominations.
Park Jung Min/CEO Park is an owner of online shopping mall Royal Avenue. Starting out as an online shopping mall,Royal Avenue has opened a showroom and a cafe in Korea since April and in July opened its first branch in China. On the opening of the store, CEO Park Jung Min has expressed that he has prepared a surprise for its Chinese consumers.
On 10 August 2010, Jung Min revealed that he has signed with CNR MEDIA. It is made up of Taiwan’s ‘Comic-Ritz’ and Local (Korea) company ‘ROY MEDIA’.
According to CNR media, "Park Jung Min signed on to us because he wants to widen his activities in the Asian region, of course inclusive of domestically (Korea). In the future, he will be aiming to attain a firm position in Asia as a multi-entertainer. Also, Jung Min will be positively and eagerly participating in any thing related to SS501 as SS501's Jung Min, and so with that, SS501 activities will be his first and foremost priority in anything".
In September 2010, it was revealed that he will be releasing his solo album soon.
He finally have his solo career in Japan as he will be appearing in the musical Bonds of Boys from November 18 to 23,2010 in Japan. Jung Min will be playing a role of an exchange student.