The present invention relates to a composition of a temporary hair thickener. In particular, the present invention relates to a composition of a temporary hair thickener comprising bamboo charcoal powder, a hydrophobic waterproof coating agent, a low grade alcohol and a propellant in a specific amount. The composition of a temporary hair thickener in accordance with the present invention can be attached to hair for a longer time as compared with the prior art hair thickeners, thereby showing improved persistency. Further, since the thickener ingredients of the composition are hardly flowed down or detached from hairs by rain or sweat, the composition of the present invention solves the problem of blotting the skin and clothes.본 발명은 일시 모발 도포제 조성물에 관한 것으로서, 더욱 상세하게는 대나무 숯 분말, 소수성 방수 피막제, 저급 알코올 및 분사제를 특정 함량 사용함으로써 기존의 모발 도포제에 비해 조성물이 모발에 오랜 시간 붙어있어 지속력이 향상되고, 모발로부터 쉽게 떨어져 나와 피부나 의복을 오염시키는 문제점을 개선한 일시 모발 도포제 조성물에 관한 것이다.