[Problem] To provide a blood flow meter capable of measuring the flow rate of the blood flow with high accuracy in a blood vessel of a living body. [Solution] An element holding body 14 having a tubular shape and having an outer diameter smaller than or equal to the outer diameter of a hollow shaft 12, which has flexibility and is insertable into a blood vessel, is provided on the distal side of the shaft 12 so as to be coaxial with the shaft 12. A flow rate sensor 21 is accommodated in the element holding body 14. The flow rate sensor 21 has a measurement element 22 in which a nickel wire is spirally wound to be formed into a coil shape so that adjacent nickel wires are not in contact with each other and are insulated. A thermal conductive insulating member 25 is provided between the flow rate sensor 21 and the element holding body 14 in the element holding body 14 and the flow rate sensor 21 is fixed in the element holding body 14 by the insulating member 25.
