Cappleman informed the agency of his decision Friday, and gave them one month to find a new location outside of his ward.
"He decided he felt the unit was pulling homeless into the area, and he does not want us to feed them," Capt. Nancy Powers, who oversees the Salvation Army's homeless program in Chicago, said.
Powers said she is worried about those in the area that rely on the truck for a daily hot meal.
The truck feeds 100 people on average Monday through Friday.
Cappleman said he hopes to combat homelessness in a different way.
"We continue to be concerned about the plight of the homeless, especially during these cold winter months. As the Salvation Army mobile outreach unit tapers off, we are working with other social service agencies to try a new approach that we believe will be more effective with empowering these individuals experiencing homelessness to get out of the cycle of homelessness," he said.