Disclosed is a liquid treatment apparatus including a nozzle positioned below the substrate retained by a substrate retaining unit. The nozzle is capable of ejecting two fluids of a mixture of a liquid and a gas. The nozzle includes a plurality of liquid-ejecting passages for ejecting a liquid and a plurality of gas-ejecting passages for ejecting a gas, and also includes a plurality of liquid-ejecting ports each corresponding to one of the liquid-ejecting passages. The liquid-ejecting ports are arrayed on a horizontal line extending inwardly from a position below a peripheral portion of the substrate. The liquid-ejecting ports are configured to eject the liquid towards the lower surface of the substrate in an ejecting direction, and the ejecting direction is inclined at an inclination angle in a rotating direction of the substrate rotated by rotational driving unit with respect to a plane including the lower surface of the substrate.