Calgary-Varsity MLA Donna Kennedy-Glans confirmed on Facebook that she has been accepted back into the PC caucus.
Kennedy-Glans says she looks forward to working to rebuild government trust with Albertans.
She left caucus under former premier Alison Redford, saying she could no longer be party to the culture of entitlement.
Calgary MLA Len Webber also crossed the floor, saying he could no longer work with Redford, and is now seeking a federal seat.
Fort McMurray MLA Mike Allen was turfed from caucus after being caught in a prostitution sting in Minnesota, but has since been allowed back in.