The authors present the first results of their multicolor polarimetric study of stars in the association Ara OB1. Stars belonging to the clusters NGC 6204, NGC 6193, NGC 6167, and the local field were observed as part of a global study of the region. The polarimetry shows that the orientation of the polarimetric vectors of member stars are very close in each cluster. For NGC 6204 and NGC 6193 the average values are 36.2±9.5, 51.6±13 respectively, and for NGC 6167 108.3±8.5 degrees. The first two values are compatible with dust aligned with the direction of the Galactic plane, while the value for NGC 6167 is not. This cluster appears to be at the center of an expanding gas structure, possibly originated by stellar winds or supernova explosions. The properties of the dust in the region, and the possibility of sequential star formation in the OB association are also discussed.