An aniline solution in l-propanol, or a pure ethanol Liquid, was introduced into vacuum as a continuous liquid flow (liquid beam) and was irradiated with a 266-nm laser. Ions were produced in the liquid beam by multiphoton absorption and partially ejected into the vacuum. The abundance of ions remaining inside the liquid beam and that ejected in the gas phase were measured simultaneously by using an inductive detector and a time-of-flight mass spectrometer, respectively, as a function of irradiation-laser power. The result is explained by the Coulomb ejection model for the ion ejection from the liquid surface. The essential feature changes slightly with the rate of the ion diffusion with respect to that of the ion ejection.