The singer's representative said Manson will be recuperating at home in Los Angeles but declined to specify the extent of the his injuries, reported Variety.
The postponed dates include Boston, Chicago, Toronto and Houston. The tour will pick up in Grand Prairie, Texas on October 15.
The band was about 45 minutes into their set and was performing their cover of Eurythmics' "Sweet Dreams". At the center of the stage was a podium, framed by two giant fake pistols, which Manson began to climb. The podium wobbled dramatically, Manson fell backward and then the prop fell upon him the band kept playing for several moments until they noticed the singer was not getting up.