Coconut shell is a by product of the coconut that known contains phytochemical and antimicrobial properties. This study aims to determine the phytochemical characteristics and the antimicrobial activity of young and old coconut shell extracts in different solvent. Completely Randomized Design was used in this study and the effect of maturity level of coconut shell and the solvent type were investigated. The maturity level of coconut shell consists of young and old coconut shell, and the solvent type were aquadest, ethanol, ethyl acetate and n-hexane. The phytochemicals characteristic including tannins, flavonoids, terpenoids and steroid and antimicrobial activity of coconut shell extract were investigated. Phytochemical qualitative analysis was indicate that young coconut shells contain tannins, flavonoids, terpenoids, and steroids, while old coconut shells contain tannins, flavonoids, and steroids. Both of young and old coconut shell extracts showed antimicrobial activity against S. cerevisiae, A. aceti and against the microbes isolated from fermented sap. Coconut shell extracted with aquadest show antimicrobial activity stronger than coconut shell extracted with other solvent.  The antimicrobial activity of young coconut shell extract stronger than old coconut shell extract. In addition, based on the absorbance spectrum, it was confirmed that coconut shell extract contains tannins, flavonoids, terpenoids and steroids.