An objective of the invention is to provide: an interlayer which is for use in a laminated glass comprising a polyvinyl acetal, which is less discolored by heating and contains less foreign materials (undissolved materials), and in which light-diffusing fine particles are dispersed in a non-agglomerated state. Another objective is to provide a laminated glass, in which, even when the interlayer film for a laminated glass is produced after repeated heating, light-diffusing fine particles are dispersed in a non-agglomerated state, and which exhibits excellent penetration resistance, excellent transparency and excellent light-diffusing properties with the use of the interlayer film. There is provided an interlayer film for a laminated glass comprising a polyvinyl acetal with an acetalization degree of 60 to 80 mol%, a content of a vinyl ester monomer unit of 0.1 to 20 mol% and a viscosity-average degree of polymerization of 1400 to 4000, and light-diffusing fine particles, wherein a difference absolute value between a refractive index of the light-diffusing fine particles and a refractive index of the composition free from the light-diffusing fine particles is 0.20 or more and a haze as measured in accordance with JIS K 7105 for a laminated glass prepared by sandwiching the interlayer film for a laminated glass between two glass sheets with a thickness of 3 mm is 20 % or less, and the interlayer film for a laminated glass satisfies formulas (1) and (2): A ˆ’ B / A