Method of manufacturing vehicle pillar and press forming die

A press forming die that is used to press form a work piece, and is used for manufacturing a vehicle pillar including:

• an upper pillar portion that is coupled to a roof rail, when the vehicle pillar is assembled to a vehicle body;
• a lower pillar portion that is coupled to a side sill, when the vehicle pillar is assembled to the vehicle body;
• and a center pillar portion that connects the upper pillar portion and the lower pillar portion, and extends in a height direction of the vehicle body, the press forming die comprising:
• an upper die that includes a die and a pair of pressing pads;
• and
• a lower die that includes a punch and a pair of blank holders, wherein
• the upper die and the lower die are configured such that both ends of the work piece in a longer side direction are clamped between the pressing pads and the punch, before a center portion of the work piece is clamped between the die and the punch to form the work piece.