Provided is a composition for use in the extension of neurocytes or for the improvement of cognitive function. A composition comprising either procyanidine B1 or procyanidine B3 as an active ingredient improves neurofunctions, The composition can be used for neurite extension or for improving cognitive function. Also, a composition containing the coffee cherskin extract as an active ingredient can be used for improving the nerve function, extending the neurite, or improving the cognitive function. The method of claim 1, further comprising the steps of: (A) culturing the coffee cherries in a cell containing procyanidine B1, procyanidine B2, or procyanidine B3, And (b) a compound of formula (I) or a compound of formula (II) as an active ingredient can also be used for improving nerve function and for extending neurite or improving cognitive function. Figure 1

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