Child marriage is the practice of marrying an individual below 18 years. The drivers of this practice include poverty, gender inequality, cultural and religious norms among others. While Ghana is one of many countries worldwide in which child marriage is practised, the literature on cultural underpinnings and implications of the practice in Ghana is sparse. This paper aims to discuss how constructions of adolescence, gender and sexuality in Ghana affect the practice of child marriage. It further examines the implications of child marriage for married girls and argues for research into the causes and mental health implications of the practice.