The aluminum carbide radical has been seen in the gas phase for the first time. The B 4SIGMA-X 4SIGMA- system near 22 000 cm-1 was observed in emission from a hollow cathode source. Three vibrational sequences were detected: DULTAv = 0, -1, and -2, and a full rotational analysis was performed on the five strongest bands, 0-0, 1-1, 0-1, 1-2, and 2-3.