Kim Jong Kyu Kim left his military duties on July 23.
Five hundred fans from coming in and out of Korea Kyu Jong deliver military training center in Jeonju.
She will get four weeks of military basic training and then will serve as a public servant workers.
Before entering, Kim Kyu Jong told eNews, "I'll be back safe and sound after undergoing the training."
Fellow member of SS501 Heo Young Saeng and Kim Hyung Jun is also present to take Kyu Jong enter training camp. Kim Kyu Jong SS501 is the first member to serve in the army.
The singer is actually exempt from military duty because of Hepatitis B, but due to the revision of military law he was classified as a public servant workers.
Kim Kyu Jong SS501 debut as a member in 2005 and recently began a solo career.
He jugan build an acting career through the musical TV drama Princess Hours and Mrs Saving Chosun. Ko Bong Sil.
He released a mini album last Meet Me Again on July 18 for fans before the military.