Monthly Shōnen Magazine

is a monthly shōnen manga magazine published in Japan by Kodansha. It was launched in 1964 under the name . In 1969 it was retitled as and its publication frequency increased from quarterly to monthly. After suspension in 1974 it started publishing again, in 1975 it was renamed as current magazine title.

It had a supplement magazine called Shōnen Magazine R, which launched in 2015. The magazine originally published a new issue once every two months, until it became a digital-only magazine in October 2019 with a monthly schedule. In January 2023, Shōnen Magazine R ceased publication. In February 2023, a new web publication called Getsu Maga Kichi (Monthly Magazine Base) replaced Shōnen Magazine R.

Manga series

Currently running manga series

Completed series

1960s

• "Terebi-kun" (Shigeru Mizuki) (1965)

1970s

• ' (writers Kōsei Ono and Kazumasa Hirai, illustrator Ryoichi Ikegami) (January 1970 – September 1971)

• (Yoshito Yamahara) (1993 – 2007)
• ' (Hiroki Yagami) (1997 – 2008)
• (Takeshi Maekawa) (1997 – 2004)
• (Harold Sakuishi) (November 1999 – April 2008)

2000s

• () (December 2000 – May 2007)
• (Masahito Soda) (March 2003 – March 2013)
• (Motohiro Katou) (October 6, 2001 – December 6, 2004)
• Yatagarasu (Aihara Tsukasa) (2002 - April 6, 2011)
• (Tadashi Kawashima) (October 2003 – February 6, 2010)
• (December 6, 2005 – August 6, 2007)
• (Hirofumi Sawada) (July 2007 – April 2015)
• ' (Hiroki Yagami) (December 2008 – December 2015)
• (Motohiro Katou) (October 2005 – August 2020)
• (Kenichi Muraeda) (July 2009 – August 2025)