In the framework of a household's collective decision processes, this study presents a structural empirical model to test the hypothesis that child labour is compelled by household's poverty and parent's bargaining power against one another. To this end, a measure for mother's intra-household bargaining power is developed. I use Iranian Household's Income and Expenditures Surveys (2005 and 2010). Estimation method used in this study is multinomial logit. Findings indicate that household's poverty is not the sole cause of child's work incidence. Instead, given the other factors such as poverty, being the first born, local labour market prospect and gender fixed, mother's bargaining power is found as a significant determinant of child's work and school attendance. However, the magnitude of its marginal effects vary by gender and across geographical areas.