A pillar trim structure comprises: a vehicular pillar; a pillar trim for covering the pillar from the inner side of a compartment; a first retained member having its one end fixed on a vehicular widthwise face of the pillar trim and extended to the side of the pillar and its other end retained in a first hole formed in the pillar; and a second retained member having its one end fixed on the vehicular widthwise face of the pillar trim and extended to the side of the pillar and its other end retained in a second hole formed in the pillar. The engagements between the first and the second retained members, and the pillar can be released by deforming the pillar trim to separate the other end of the first retained member and the other end of the second retained member.