A substrate support member configured to support a substrate in a liquid ejecting apparatus that includes a liquid containing body with a flexible liquid containing section that contains a liquid, a liquid containing vessel that contains the liquid containing body, a mounting section to which the liquid containing vessel is attachably and detachably mounted, the mounting section having an apparatus side insertion opening that is formed on a +Y axis direction side and an apparatus side wall section that is formed on a -Y axis direction side, and the liquid containing vessel being inserted in the mounting section in the -Y axis direction from the apparatus side insertion opening to the apparatus side wall section, a liquid supply tube provided to the apparatus side wall section and receiving supply of the liquid from the liquid containing body, and an apparatus side terminal section provided to the apparatus side wall section and electrically connected due to contact with regard to a contact section of the substrate that is provided in the liquid containing body, where three spatial axes that are orthogonal to each other have an X axis, a Y axis, and a Z axis where, out of X axis directions along the X axis, a positive direction is a +X axis direction and a negative direction is a -X axis direction, out of Y axis directions along the Y axis, a positive direction is the +Y axis direction and a negative direction is the -Y axis direction, and out of Z axis directions along the Z axis, a positive direction is a +Z axis direction and a negative direction is a -Z axis direction, characterized in that the substrate support member comprises: a first engaging section configured to engage with regard to the liquid containing vessel from the +Z axis direction side at a position more to the -Y axis direction side than the contact section; a second engaging section configured to engage with the liquid containing section at a position more to the +Y axis direction side than the substrate, and provided more to the -Z axis direction side than the contact section; a first pressed section configured to receive a first pressing force with a component in the -Z axis direction at a position more to the -Y axis direction side than the contact section; and a second pressed section configured to receive a second pressing force with a component in the -Z axis direction at a position more to the +Y axis direction side than the contact section, where the X axis, the Y axis, and the Z axis with regard to the liquid containing vessel in a state of being mounted in the mounting section are three spatial axes in the liquid containing vessel. a first engaging section configured to engage with regard to the liquid containing vessel from the +Z axis direction side at a position more to the -Y axis direction side than the contact section; a second engaging section configured to engage with the liquid containing section at a position more to the +Y axis direction side than the substrate, and provided more to the -Z axis direction side than the contact section; a first pressed section configured to receive a first pressing force with a component in the -Z axis direction at a position more to the -Y axis direction side than the contact section; and a second pressed section configured to receive a second pressing force with a component in the -Z axis direction at a position more to the +Y axis direction side than the contact section, where the X axis, the Y axis, and the Z axis with regard to the liquid containing vessel in a state of being mounted in the mounting section are three spatial axes in the liquid containing vessel.