The present invention relates to a pharmaceutical preparation for oral administration comprising, as an active ingredient, clomipramine or a pharmaceutically acceptable salt thereof; and a cation exchange resin and an anion polymer as a taste masking agent, wherein the pharmaceutical preparation can be orally administered even while comprising a pharmaceutically effective amount of clomipramine because the unique tastes of clomipramine, particularly, all of the bitter taste, spicy taste and burning taste are effectively masked, and thus the convenience of drug intake and portability is improved, and a method for manufacturing thereof.