A Si-killed steel wire rod excellent in fatigue properties, comprising a Si-killed steel consisting of: C: 1.2% or less (not inclusive of 0%, and "%" means "mass%" unless otherwise indicated, hereinafter the same), Si: 0.2 to 3%, Mn: 0.1 to 2%, and optionally, one or more elements selected from the group consisting of: Cr: 3% or less (not inclusive of 0%), Ni: 0.5% or less (not inclusive of 0%), V: 0.5% or less (not inclusive of 0%), Ti: 0.1 % or less (not inclusive of 0%), Zr: 0.1 % or less (not inclusive of 0%), Cu: 0.7% or less (not inclusive of 0%), Nb: 0.5% or less (not inclusive of 0%), Mo: 0.5% or less (not inclusive of 0%), Co: 0.5% or less (not inclusive of 0%), W: 0.5% or less (not inclusive of 0%), B: 0.005% or less (not inclusive of 0%), alkali metal: 0.002% or less (not inclusive of 0%), REM: 0.01% or less (not inclusive of 0%), Ba: 0.01% or less (not inclusive of 0%), and Sr: 0.01% or less (not inclusive of 0%), with the balance consisting of iron and unavoidable impurities, wherein 80% or more of the number of oxide-based inclusions present in the steel wire rod is a CaO-Al 2 O 3 -SiO 2 based inclusion satisfying the following compositions and: CaO+Al 2 O 3 +SiO 2 +MgO+MnO≥85% when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MgO+MnO≤15% and CaO>MnO, wherein an average composition of the CaO-Al 2 O 3 -SiO 2 based inclusion satisfies the following: when CaO+Al 2 O 3 +SiO 3 +MgO+MnO is standardized as 100%, CaO: 10 to 60%, Al 2 O 3: 3 to 40%, and SiO 2: 30% or more and less than 85%, and an average composition of a MnO-Al 2 O 3 -SiO 2 based inclusion satisfying the following satisfies the following: when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MnO+Al 2 O 3 +SiO 2 ≥80% and MnO>CaO, when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MnO: 10 to 70%, Al 2 O 3: 3 to 50%, and SiO 2: 20 to 75%. C: 1.2% or less (not inclusive of 0%, and "%" means "mass%" unless otherwise indicated, hereinafter the same), Si: 0.2 to 3%, Mn: 0.1 to 2%, and optionally, one or more elements selected from the group consisting of: Cr: 3% or less (not inclusive of 0%), Ni: 0.5% or less (not inclusive of 0%), V: 0.5% or less (not inclusive of 0%), Ti: 0.1 % or less (not inclusive of 0%), Zr: 0.1 % or less (not inclusive of 0%), Cu: 0.7% or less (not inclusive of 0%), Nb: 0.5% or less (not inclusive of 0%), Mo: 0.5% or less (not inclusive of 0%), Co: 0.5% or less (not inclusive of 0%), W: 0.5% or less (not inclusive of 0%), B: 0.005% or less (not inclusive of 0%), alkali metal: 0.002% or less (not inclusive of 0%), REM: 0.01% or less (not inclusive of 0%), Ba: 0.01% or less (not inclusive of 0%), and Sr: 0.01% or less (not inclusive of 0%), Cr: 3% or less (not inclusive of 0%), Ni: 0.5% or less (not inclusive of 0%), V: 0.5% or less (not inclusive of 0%), Ti: 0.1 % or less (not inclusive of 0%), Zr: 0.1 % or less (not inclusive of 0%), Cu: 0.7% or less (not inclusive of 0%), Nb: 0.5% or less (not inclusive of 0%), Mo: 0.5% or less (not inclusive of 0%), Co: 0.5% or less (not inclusive of 0%), W: 0.5% or less (not inclusive of 0%), B: 0.005% or less (not inclusive of 0%), alkali metal: 0.002% or less (not inclusive of 0%), REM: 0.01% or less (not inclusive of 0%), Ba: 0.01% or less (not inclusive of 0%), and Sr: 0.01% or less (not inclusive of 0%), with the balance consisting of iron and unavoidable impurities, wherein 80% or more of the number of oxide-based inclusions present in the steel wire rod is a CaO-Al 2 O 3 -SiO 2 based inclusion satisfying the following compositions and: CaO+Al 2 O 3 +SiO 2 +MgO+MnO≥85% when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MgO+MnO≤15% and CaO>MnO, CaO+Al 2 O 3 +SiO 2 +MgO+MnO≥85% when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MgO+MnO≤15% and CaO>MnO, wherein an average composition of the CaO-Al 2 O 3 -SiO 2 based inclusion satisfies the following: when CaO+Al 2 O 3 +SiO 3 +MgO+MnO is standardized as 100%, CaO: 10 to 60%, Al 2 O 3: 3 to 40%, and SiO 2: 30% or more and less than 85%, and when CaO+Al 2 O 3 +SiO 3 +MgO+MnO is standardized as 100%, CaO: 10 to 60%, Al 2 O 3: 3 to 40%, and SiO 2: 30% or more and less than 85%, and an average composition of a MnO-Al 2 O 3 -SiO 2 based inclusion satisfying the following satisfies the following: when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MnO+Al 2 O 3 +SiO 2 ≥80% and MnO>CaO, when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MnO: 10 to 70%, Al 2 O 3: 3 to 50%, and SiO 2: 20 to 75%. when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MnO+Al 2 O 3 +SiO 2 ≥80% and MnO>CaO, when CaO+Al 2 O 3 +SiO 2 +MgO+MnO is standardized as 100%, MnO: 10 to 70%, Al 2 O 3: 3 to 50%, and SiO 2: 20 to 75%.