RESERVOIR TANK AND BRAKE HYDRAULIC PRESSURE GENERATOR

As an example, a reservoir tank according to an embodiment includes: an upper case; a lower case coupled to the upper case; a partition wall extending from the upper case toward the lower case and separating, in a horizontal direction, first and second rooms which are included in a space inside the upper case and the lower case; and a partition member having a first wall covering the first room from below, and a second wall protruding upward from the first wall and being in contact with the partition wall. The partition wall includes a first slit opening to a lower edge of the partition wall and establishing communication between the first and second rooms, and at least an edge of the first slit and the second wall forming a first hole which establishes communication between the first and second rooms and which is positioned above the first wall.