Recording apparatus and tank

A recording apparatus comprising:

• a tank including:
• a chamber configured to store liquid to be supplied to a recording head that ejects the liquid;
• and
• a filling port from which the liquid is injected into the chamber;
• and
• an injection auxiliary member configured to assist injecting of the liquid into the chamber from the filling port, the injection auxiliary member including:
• a first flow channel defined by a first upper end portion that opens toward outside of the tank and a first lower end portion that opens toward inside of the tank;
• and
• a second flow channel defined by a second upper end portion that opens toward outside of the tank and a second lower end portion that opens toward inside of the tank,
• wherein the second flow channel has an expansion portion arranged in a middle portion between the second upper end portion and the second lower end portion and configured to form a step to expand a cross-sectional area.