A conveyance seat that includes a seat cushion, a seatback including a seatback frame therein, and a forward foldable headrest and is stored by moving at least one of the seat cushion and the seatback to a storing position and folding the headrest forward, the conveyance seat comprising: a folding mechanism that performs a folding operation for folding the headrest forward; a first receiving portion that receives a first operation performed by a passenger when folding only the headrest forward; a second receiving portion that receives a second operation performed by the passenger when storing the conveyance seat; a first driving portion that drives only the folding mechanism by the first operation received by the first receiving portion to permit the folding mechanism to perform the folding operation; and a second driving portion that drives the folding mechanism along with a movement of at least the one of the seat cushion and the seatback to a storing position to permit the folding mechanism to perform the folding operation when the second receiving portion receives the second operation, wherein the folding mechanism, the first driving portion, and the second driving portion are all attached to the seatback frame, wherein the folding mechanism includes a pillar that supports the headrest, a support portion that supports the pillar to be rotatable in a front to back direction, a biasing member that biases the pillar forward, and a locking member that engages with the pillar to hold the pillar in a standing state against a biasing force of the biasing member, characterized in that the folding mechanism further includes a slide member that slides to release an engagement state between the locking member and the pillar, wherein the first driving portion includes a fastening portion that is formed in one longitudinal end of the slide member to fasten the first receiving portion and the slide member to each other, wherein a movement mechanism is further provided which performs a movement operation for moving at least the one of the seat cushion and the seatback to the storing position by the second operation received by the second receiving portion, wherein the second driving portion includes a connection portion that is formed in the other end side of the slide member that is the side opposite to the fastening portion to connect the movement mechanism and the slide member to each other, and wherein the fastening portion is located near the first receiving portion in relation to the connection portion. a folding mechanism that performs a folding operation for folding the headrest forward; a first receiving portion that receives a first operation performed by a passenger when folding only the headrest forward; a second receiving portion that receives a second operation performed by the passenger when storing the conveyance seat; a first driving portion that drives only the folding mechanism by the first operation received by the first receiving portion to permit the folding mechanism to perform the folding operation; and a second driving portion that drives the folding mechanism along with a movement of at least the one of the seat cushion and the seatback to a storing position to permit the folding mechanism to perform the folding operation when the second receiving portion receives the second operation, wherein the folding mechanism, the first driving portion, and the second driving portion are all attached to the seatback frame, wherein the folding mechanism includes a pillar that supports the headrest, a support portion that supports the pillar to be rotatable in a front to back direction, a biasing member that biases the pillar forward, and a locking member that engages with the pillar to hold the pillar in a standing state against a biasing force of the biasing member, characterized in that the folding mechanism further includes a slide member that slides to release an engagement state between the locking member and the pillar, wherein the first driving portion includes a fastening portion that is formed in one longitudinal end of the slide member to fasten the first receiving portion and the slide member to each other, wherein a movement mechanism is further provided which performs a movement operation for moving at least the one of the seat cushion and the seatback to the storing position by the second operation received by the second receiving portion, wherein the second driving portion includes a connection portion that is formed in the other end side of the slide member that is the side opposite to the fastening portion to connect the movement mechanism and the slide member to each other, and wherein the fastening portion is located near the first receiving portion in relation to the connection portion.