A flux-cored wire suitable for welding a steel having a tensile strength of 950 MPa to 1500 MPa, which is a flux-cored wire for gas shielded arc welding, the flux-cored wire comprising: an outer steel sheath; and a flux filled into the outer steel sheath, wherein one or more of CaF 2, BaF 2, SrF 2, and MgF 2 are included in the wire and, when a total amount thereof is defined as α, the α is more than 2.0% and equal to or less than 8.0% in terms of mass% with respect to a total mass of the wire, one or more of Ti oxide, Si oxide, Mg oxide, and Al oxide are included in the wire and, when a total amount thereof is defined as β, the β is 0.01% to 1.20% in terms of mass% with respect to the total mass of the wire, a total amount of CaCO 3, BaCO 3, SrCO 3, and MgCO 3 is less than 0.60% in terms of mass% with respect to the total mass of the wire, an amount of an iron powder in the flux is less than 5.0% in terms of mass% with respect to the total mass of the wire, a ratio of an amount of the CaF 2 with respect to the α is 0.50 or more, a ratio of the α with respect to the β is 2.0 to 800.0, a total amount of oxides of Na or K or fluorides of Na or K is 0.001% to 0.40% in terms of mass% with respect to the total mass of the wire, a chemical composition consists of, in terms of mass% with respect to the total mass of the wire, C: more than 0.080% and equal to or less than 0.200%, Si: 0.05% to 1.50%, Mn: 1.0% to 2.2%, Al: 0.001 % to 0.400%, Ni: 1.0% to 9.0%, V: more than 0.050% and equal to or less than 0.300%. P: 0.020% or less, S: 0.020% or less, Cu: 0% to 0.800%, Cr: 0% to 2.5%, Mo: 0% to 2.0%, Ti: 0% to 0.300%, Nb: 0% to 0.05%, B: 0% to 0.0100%, Mg: 0% to 0.8%, Ca: 0% to 0.5%, REM: 0% to 0.0100%, and remainder: iron and impurities, and Ceq defined in following Expression a is 0.60% to 1.20%, Ceq = C + Si / 24 + Mn / 6 + Ni / 40 + Cr / 5 + Mo / 4 + V / 14 in which elements noted in brackets represent amounts of the respective elements in terms of mass%. an outer steel sheath; and a flux filled into the outer steel sheath, wherein one or more of CaF 2, BaF 2, SrF 2, and MgF 2 are included in the wire and, when a total amount thereof is defined as α, the α is more than 2.0% and equal to or less than 8.0% in terms of mass% with respect to a total mass of the wire, one or more of Ti oxide, Si oxide, Mg oxide, and Al oxide are included in the wire and, when a total amount thereof is defined as β, the β is 0.01% to 1.20% in terms of mass% with respect to the total mass of the wire, a total amount of CaCO 3, BaCO 3, SrCO 3, and MgCO 3 is less than 0.60% in terms of mass% with respect to the total mass of the wire, an amount of an iron powder in the flux is less than 5.0% in terms of mass% with respect to the total mass of the wire, a ratio of an amount of the CaF 2 with respect to the α is 0.50 or more, a ratio of the α with respect to the β is 2.0 to 800.0, a total amount of oxides of Na or K or fluorides of Na or K is 0.001% to 0.40% in terms of mass% with respect to the total mass of the wire, a chemical composition consists of, in terms of mass% with respect to the total mass of the wire, C: more than 0.080% and equal to or less than 0.200%, Si: 0.05% to 1.50%, Mn: 1.0% to 2.2%, Al: 0.001 % to 0.400%, Ni: 1.0% to 9.0%, V: more than 0.050% and equal to or less than 0.300%. P: 0.020% or less, S: 0.020% or less, Cu: 0% to 0.800%, Cr: 0% to 2.5%, Mo: 0% to 2.0%, Ti: 0% to 0.300%, Nb: 0% to 0.05%, B: 0% to 0.0100%, Mg: 0% to 0.8%, Ca: 0% to 0.5%, REM: 0% to 0.0100%, and remainder: iron and impurities, and