1. A Korean character input apparatus for composing and completing a Korean character according to a user touch input using consonant and vowel input keys, the apparatus comprising: an input window comprising a consonant input key, a “ ” vowel input key provided to the right of the consonant input key, and a “ ” vowel input key provided under the consonant input key; a character combining means by which when one of the “ ” vowel input key and the “ ” vowel input key of the input window is touch-selected, a consonant corresponding to the consonant input key provided to the left of the “ ” vowel input key or provided above the “ ” vowel input key is automatically selected as an initial consonant, and thus is combined with a vowel corresponding to the touch-input vowel input key; an output window for displaying the composed Korean character; and a controller for controlling touch input on the input window and an output of the composed Korean character on the output window.