Bell (coach's decision) is inactive for Sunday's NFC Championship Game against the Lions, Lindsey Pallares of the 49ers' official site reports.
Bell will sit out a second straight game after not suiting up for the Niners' divisional-round win over the Packers. His last appearance was Week 18 against the Rams, when he played 44 snaps -- 37 on offense and seven on special teams -- and caught one of five targets for a five-yard touchdown.