GL490 is a solitary infrared source toward a heavily obscured region. The source exhibits indications of energetic mass outflows of the ionized and molecular gas (e.g. Simon et al. 1981, Lada and Harvey 1981). Generally, GL490 is considered as a young stellar object as suggested by the association with dense molecular gas (Morris et al. 1974, Kawabe et al 1984). In order to understand the distribution of the molecular gas around GL490, we have undertaken an extensive mapping in the J = 1-0 CO and 13CO lines with a 3′ beam (the Nagoya 4-m telescope) and a 15″ beam (the 45-m telescope).