Door trim cover device for vehicle

A door trim cover device for a vehicle is configured so that in a vehicle including no B-pillar, a trim cover is raised by operation of an actuator to enable an operation of opening or closing a door without interference between a lower striker and a door trim while the door is opened or closed with respect to the lower striker on a side sill fastened to a lower latch of the door, and the trim cover is lowered by a reverse operation of the actuator in a closed state of the door so that the trim cover is matched with a body weather strip together with the door trim.