The Financial Sector of an economy is the livewire that provides support for other productive sectors such as the manufacturing sector. No nation can survive without a well-developed financial sector. Nigeria financial sector is yet to fulfil its full potentials but to achieve this, the sector needs to be well-deepened. The review of both theoretical and empirical literatures provided a basis for the framework for the research methodology. Using an ex-post facto research design, the study made use of quantitative and statistical tools such as the Vector Error Correction (VEC) model. The data for the study was sourced from the Central Bank of Nigerias statistical bulletin and spans the period between 1987 and 2021. The optimal lag selection criteria indicated the second period lag as the appropriate lag order to be used for the study. From the findings of the model estimation and analysis, it was discovered that employment impacts positively on manufacturing sector output. It was also seen that financial sector development variables impact the manufacturing sector positively both in the long and short-runs, however deposit liability and credit to private sector had negative impacts on manufacturing output. In light of the findings, the study recommends among others that the government through the appropriate financial management and regulatory authorities should initiate and encourage policies that would enhance the development of the financial sector such as facilitating access to credit and encouraging stock market participation.