Monthly Shōnen Magazine

{{Short description|Japanese manga magazine}}

{{Distinguish|Bessatsu Shōnen Magazine}}

{{refimprove|date=August 2016}}

{{Infobox magazine

| title = Monthly Shonen Magazine

| image_file = Gekkan Shōnen Magazine logo.png

| image_size =

| image_caption =

| editor =

| editor_title =

| staff_writer =

| frequency = Monthly

| circulation = 408,110
(January–March, 2018)

| category = Shōnen manga{{cite web |url=http://www.j-magazine.or.jp/magadata/index.php?module=list&action=list&cat1cd=1&cat3cd=14&period_cd=34|title=Boy's Manga |publisher=Japanese Magazine Publishers Association |date=September 2016 |language=Japanese |accessdate=November 6, 2016 }}

| company = Kodansha

| publisher =

| firstdate = {{start date and age|1964}}

| country = Japan

| language = Japanese

| website =

| issn =

}}

{{nihongo|Monthly Shōnen Magazine|月刊少年マガジン|Gekkan Shōnen Magajin}} is a monthly shōnen manga magazine published in Japan by Kodansha. It was launched in 1964 under the name {{nihongo|Bessatsu Shōnen Magazine|別冊少年マガジン}}. In 1969 it was retitled as {{nihongo|Monthly Bessatsu Shōnen Magazine|月刊別冊少年マガジン}} 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.{{Cite web|url=https://www.animenewsnetwork.com/news/2019-10-18/shonen-magazine-r-switches-to-digital-only-new-monthly-schedule/.152369|title=Shōnen Magazine R Switches to Digital-Only, New Monthly Schedule|website=Anime News Network}} In January 2023, Shōnen Magazine R ceased publication.{{cite web|last1=Cayanan|first1=Joanna|title=Kodansha's Shonen Magazine R Ends Publication in January|url=https://www.animenewsnetwork.com/news/2022-11-21/kodansha-shonen-magazine-r-ends-publication-in-january/.192097|website=Anime News Network|access-date=December 6, 2022|date=November 21, 2022}} In February 2023, a new web publication called Getsu Maga Kichi (Monthly Magazine Base) replaced Shōnen Magazine R.{{cite web|last1=Cayanan|first1=Joanna|title=Kodansha's Monthly Shonen Magazine Gets New Web Publication|url=https://www.animenewsnetwork.com/news/2022-12-06/kodansha-monthly-shonen-magazine-gets-new-web-publication/.192627|website=Anime News Network|access-date=December 6, 2022|date=December 6, 2022}}

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