A biaxially orientated polypropylene film for capacitor includes protrusions on both surfaces. The biaxially orientated polypropylene film has a thickness (t1) of 1 to 3 μm, has a ten point average roughness (SRz) of 50 nm or more and less than 500 nm on both surfaces, and meets equations (1) and (2) where one surface and the other surface are referred to as a surface A and a surface B, respectively: 150≦Pa≦400  (1) 50≦Pb≦150  (2) wherein Pa denotes number of protrusions per 0.1 mm2 on the surface A and Pb denotes number of protrusions per 0.1 mm2 on the surface B.