A temperature measurement device includes: a detector to detect a first Stokes component and a first anti-Stokes component when a light is input into a first end of an optical fiber and detect a second Stokes component and a second anti-Stokes component when a light is input into a second end; and a processor configured to execute a process comprising: replacing the second anti-Stokes component with a value according to the first Stokes component, the first anti-Stokes component and the second Stokes component when any one of correlations of the second anti-Stokes component to the first Stokes component and the first anti-Stokes component is less than or equal to a threshold value; and measuring a temperature at the sample point by using the first Stokes component, the first anti-Stokes component, the second Stokes component, and the second anti-Stokes component that is replaced in the replacing.