A straddled vehicle comprising: an engine; an intake flow rate control device that adjust a flow rate of intake air to be supplied to the engine; an intake member (50, 250, 350) that includes an inner wall defining a flow passage (54, 254) that guides the intake air from the intake flow rate control device to the engine; wherein the intake member (50, 250, 350) includes an outer wall provided with an inlet and an outlet, the inlet configured to guide the intake air which has passed through the intake flow rate control device to the flow passage (54, 254), the outlet configured to discharge the intake air which has flowed into the inlet; and wherein an opening area of the outlet of the intake member (50, 250, 350) is smaller than an opening area of the inlet of the intake member (50, 250, 350); the straddle vehicle being characterized in that the intake member (50, 250, 350) is an integral member made of resin, an annular step is formed on the inner wall of the intake member (50, 250, 350), the annular step includes an upstream wall portion that extends in an axial direction (Da) of the intake member (50, 250, 350), a downstream wall portion that extends in the axial direction (Da) at a position downstream of the upstream wall portion with respect to a flow direction of the intake air, and a connecting wall portion that connects a first connecting end of the upstream wall portion and a second connecting end of the downstream wall portion with each other, the second connecting end of the downstream wall portion is disposed at a more outward position than the first connecting end of the upstream wall portion in a radial direction (Dr) of the intake member (50, 250, 350), and the connecting wall portion extends outwardly in the radial direction (Dr) of the intake member (50, 250, 350) from the first connecting end toward the second connecting end; and an inner diameter of the intake member (50, 250, 350) decreases as a distance from the inlet toward the upstream wall portion of the annular step increases, and decreases as a distance from the outlet toward the downstream wall portion of the annular step increases; wherein the connecting wall portion of the annular step includes an inclined portion obliquely inclined with respect to a center line of the intake member (50, 250, 350) so as to move away from the center line of the intake member (50, 250, 350) from the upstream wall portion toward the downstream wall portion, wherein a center line of the intake member includes an first arcuate portion and an second arcuate portion, and a first curvature center of the first arcuate portion and a second curvature center of the second arcuate portion are at different positions. an engine; an intake flow rate control device that adjust a flow rate of intake air to be supplied to the engine; an intake member (50, 250, 350) that includes an inner wall defining a flow passage (54, 254) that guides the intake air from the intake flow rate control device to the engine; wherein the intake member (50, 250, 350) includes an outer wall provided with an inlet and an outlet, the inlet configured to guide the intake air which has passed through the intake flow rate control device to the flow passage (54, 254), the outlet configured to discharge the intake air which has flowed into the inlet; and wherein an opening area of the outlet of the intake member (50, 250, 350) is smaller than an opening area of the inlet of the intake member (50, 250, 350); the straddle vehicle being characterized in that the intake member (50, 250, 350) is an integral member made of resin, an annular step is formed on the inner wall of the intake member (50, 250, 350), the annular step includes an upstream wall portion that extends in an axial direction (Da) of the intake member (50, 250, 350), a downstream wall portion that extends in the axial direction (Da) at a position downstream of the upstream wall portion with respect to a flow direction of the intake air, and a connecting wall portion that connects a first connecting end of the upstream wall portion and a second connecting end of the downstream wall portion with each other, the second connecting end of the downstream wall portion is disposed at a more outward position than the first connecting end of the upstream wall portion in a radial direction (Dr) of the intake member (50, 250, 350), and the connecting wall portion extends outwardly in the radial direction (Dr) of the intake member (50, 250, 350) from the first connecting end toward the second connecting end; and an inner diameter of the intake member (50, 250, 350) decreases as a distance from the inlet toward the upstream wall portion of the annular step increases, and decreases as a distance from the outlet toward the downstream wall portion of the annular step increases; wherein the connecting wall portion of the annular step includes an inclined portion obliquely inclined with respect to a center line of the intake member (50, 250, 350) so as to move away from the center line of the intake member (50, 250, 350) from the upstream wall portion toward the downstream wall portion, wherein a center line of the intake member includes an first arcuate portion and an second arcuate portion, and a first curvature center of the first arcuate portion and a second curvature center of the second arcuate portion are at different positions.