Vehicular seat

A vehicle seat, comprising:

• a gap concealing member positioned between a lower part of a back lining of a seatback and a deck board located behind the seatback;
• and
• a support plate configured to support the gap concealing member from underneath when the seatback is collapsed forward, the support plate comprising
• a fixing plate part fixed on a back lining surface of the seatback and abutted to a rear side of the gap concealing member when the seatback is collapsed forward;
• and
• a movable plate part aligned with the fixing plate part in a seat width direction when the seatback is collapsed forward and joined to the rear surface of the gap concealing member, wherein:
• the movable plate part covers a seat side shield when the seatback is collapsed forward,
• the seat side shield is configured to cover a side of a seatback main body,
• the movable plate part abuts the seat side shield from behind when the seatback is reclined rearward, and
• the movable plate part is configured to shift away from the fixing plate part when the seatback is reclined rearward.