Monthly Shounen Jump is a shounen manga magazine published by Shueisha. It was launched in December 6, 1969.
In the beginning it was launched as 'Bessatsu Shounen Jump' but was then renamed as 'Monthly Shounen Jump' in 1974.
On February 2007, magazine was announced to be discontinued as of July issue because of poor sales. Series that were still on-going at that time were transfered to Weekly Shounen Jump for the time being. Few months later a new magazine, Jump SQ, Monthly Shounen Jump successor, took over their past works that were transfered to Weekly Shounen Jump.