To provide a copper-based sliding material which has excellent seize resistance by controlling a dispersed state of needle-shaped Mn-Si-based compounds crystallized in a brass structure.

In the copper-based sliding material 1 having the needle-shaped Mn-Si-based compounds 3 dispersed in the brass structure 2, 50% or more of the total number of the needle-shaped Mn-Si-based compounds 3 having a length in the long axis direction of 50 μm or more are composed of a plurality of small particles 4. Thereby, even if the needle-shaped Mn-Si-based compounds 3 fall off during sliding, the small particles 4 which constitute the needle-shaped Mn-Si-based compounds 3 may fall off. Thus, the frequency of falling off of the coarse needle-shaped Mn-Si-based compound 3, which damages a shaft and a bearing, is decreased. Therefore, seizure hardly occurs.