Resin cage for tapered roller bearing and tapered roller bearing including the resin cage

Provided is a resin cage for a tapered roller bearing in which a mold parting line which is extended in an axial direction is formed in a pillar portion defining a pocket. On facing surfaces of adjacent pillar portions, on an outer diameter side from the mold parting line, a first conical surface which slides in contact with an outer peripheral surface of a tapered roller is formed, and a first flat surface in a radial direction is formed in a portion on the outer diameter side from the first conical surface. On an inner diameter side from the mold parting line, a second conical surface which slides in contact with the outer peripheral surface of the tapered roller is formed, and a second flat surface in a radial direction is formed in a portion on the inner diameter side from the second conical surface. 圆锥滚子轴承用树脂制保持架在划分兜孔的支柱上形成有沿轴向延伸的模具分割线，在相邻的支柱的对置面中，在比模具分割线靠外径侧的位置，形成有与圆锥滚子的外周面滑动接触的第1圆锥面，并且，在比第1圆锥面靠外径侧的部分，形成有第1径向平面，在比模具分割线靠内径侧的位置，形成有与圆锥滚子的外周面滑动接触的第2圆锥面，并且，在比第2圆锥面靠内径侧的部分，形成有第2径向平面。