The present invention provides a paramyxovirus vector for gene transfer to the cardiovascular system and uses thereof. The invention enables the efficient transfer of a foreign gene product to the cardiovascular system by use of the paramyxovirus vector. Products of genes introduced by intranasal or intramuscular administration of the paramyxovirus vector were detected in blood at high levels. Theadministration of a vector for the expression of the anti-inflammatory cytokine IL-10 inhibited collagen deposition in lung of pulmonary fibrosis model animal. Thus, the vector of the present invention is suitable for gene transfer to the cardiovascular system.