City skyline is an element of the cityscape, but makes a whole image of the city.This study is to develop the new way of express city skyline with notes of music.After drawing some city skyline with photoes was drawned, pitch and length of tone was measured and transfferred to notes. Through this study, it came out to be possible to note skyline, remaining features which some of the buildings have a characteristic fi gure of skyline. Skyline seems to consist several pitch and length of line without meanings.With this method of note, it is possibled fi nd the meaning of composition of skyline and compare between cities big and small in one measurement.