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Music creates social bonds-it synchronizes movements, emotions and physiological responses. The hormone oxytocin has received great attention in social cognitive neuroscience because of its role in social bonding, and it has been shown that group singing and individual music listening release oxytocin. In this study we investigated the role of oxytocin on interpersonal rhythmic synchronization, and its relation to pro-social effects, using an interactive finger tapping setup. Pairs of two tapped together, and both participants in each pair received either oxytocin or a non-active placebo as nasal spray. Our preliminary analyses showed trends in which intranasally administered oxytocin improved interpersonal synchronization. In this poster we present the full data set and analysis of the effect of oxytocin on interpersonal synchronization and social bonding.