Silica glass crucible for pulling up silicon single crystal and method for manufacturing thereof

A silica glass crucible used for pulling up a silicon single crystal, comprising:

• a natural silica glass layer that constitutes an outer layer of the crucible;
• and
• a synthetic silica glass layer that constitutes an inner layer of the crucible, wherein:
• the synthetic silica glass layer includes a first synthetic silica glass layer formed in a region within 50% of a diameter of the crucible from the center of a crucible bottom section, and a second synthetic silica glass layer formed in a region in the remaining diameter of the crucible and which excludes the formation region of the first synthetic silica glass layer,
• the first synthetic silica glass layer has a thickness of 0.5 mm or more and 1.5 mm or less and a concentration of an OH group included in the first synthetic silica glass layer being 100 ppm or less,
• a thickness of the second synthetic silica glass layer is larger than that of the first synthetic silica glass layer, and
• a concentration of an OH group included in the second synthetic silica glass layer is larger than the concentration of the OH group included in the first synthetic silica glass layer.