Line 4 of the Fuzhou Metro () is a metro line in Fuzhou. It starts at Fenghuangchi and ends at Difengjiang. The total length is 28.4 km (24 km in operation). Line 4's color is orange. The section from Fenghuangchi to Difengjiang opened on 27 August 2023. An extension from Fenghuangchi to Banzhou opened on 10 December 2025.
Phase 2 of Line 4 has not been approved by the NDRC. The station list will be added after the NDRC approval.