A flow measurement structure comprising: a conduit through which fluid to be measured flows; and a diverter which diverts the fluid flowing through the conduit , and guides the diverted fluid to a detection element for measuring a flow rate of the fluid, wherein an inlet of the diverter is disposed at a peripheral section in the conduit , wherein the conduit includes, upstream of the inlet , a guide section which guides the fluid to a central section in the conduit wherein the guide section is configured by forming an inclined section extending from the inner surface of the conduit such that a diameter of the inner surface of the conduit is configured to get smaller from an upstream side toward a downstream side to form a narrowest flow section of the inclined section and configured to increase after the narrowest flow section of the inclined section to the diameter of the conduit before getting smaller, and wherein defining distances in a longitudinal section, perpendicularly to a central axis of the conduit , a distance between the central axis and the inlet is greater than a distance between the central axis and a distal end of the inclined section at the downstream side, characterized in that the flow measurement structure further comprises of a resistive element , wherein the resistive element is arranged downstream of the inlet and is configured to provide a resistance to the fluid flowing in the conduit, the resistive element having a first slope configured to slope the diameter of the inner surface of the conduit to get smaller from an upstream side towards a downstream side, and a second slope adjacent to the first slope and downstream of the first slope, the second slope being configured to slope the smaller diameter of the inner surface of the conduit back to the diameter of the conduit before getting smaller, and wherein the resistive element is opened at the central section in the conduit . a conduit through which fluid to be measured flows; and a diverter which diverts the fluid flowing through the conduit , and guides the diverted fluid to a detection element for measuring a flow rate of the fluid, wherein an inlet of the diverter is disposed at a peripheral section in the conduit , wherein the conduit includes, upstream of the inlet , a guide section which guides the fluid to a central section in the conduit wherein the guide section is configured by forming an inclined section extending from the inner surface of the conduit such that a diameter of the inner surface of the conduit is configured to get smaller from an upstream side toward a downstream side to form a narrowest flow section of the inclined section and configured to increase after the narrowest flow section of the inclined section to the diameter of the conduit before getting smaller, and wherein defining distances in a longitudinal section, perpendicularly to a central axis of the conduit , a distance between the central axis and the inlet is greater than a distance between the central axis and a distal end of the inclined section at the downstream side, characterized in that the flow measurement structure further comprises of a resistive element , wherein the resistive element is arranged downstream of the inlet and is configured to provide a resistance to the fluid flowing in the conduit, the resistive element having a first slope configured to slope the diameter of the inner surface of the conduit to get smaller from an upstream side towards a downstream side, and a second slope adjacent to the first slope and downstream of the first slope, the second slope being configured to slope the smaller diameter of the inner surface of the conduit back to the diameter of the conduit before getting smaller, and wherein the resistive element is opened at the central section in the conduit . <EOS>