In this paper we focus on the relationship between fiscal decentralization and government quality. In a sample of 29 developing and developed countries over the period 1984-1997, fiscal decentralization has a positive effect on institutional quality but this effect diminishes as countries become wealthier. Moreover, the positive effect of fiscal decentralization on government quality is reduced by electoral and decision-making decentralization in poor and medium income countries whereas these forms of decentralization seem to improve the impact of fiscal decentralization on government quality in rich countries.