Multilayer laminate film

A multilayer laminated film comprising a multilayer laminate in which a birefringent layer comprising a first resin and an isotropic layer comprising a second resin are alternately laminated,

• the multilayer laminated film being capable of reflecting light with a wavelength of 380 to 780 nm due to optical interference caused from the lamination structure of the birefringent layer and the isotropic layer,
• a series of the birefringent layers having a first monotonically increasing region of optical thickness, wherein the first monotonically increasing region comprises a monotonically increasing region 1A in which the maximum optical thickness is 100 nm or less, and a monotonically increasing region 1B in which the minimum optical thickness is more than 100 nm, and a ratio 1B/1A of a slope 1B of the monotonically increasing region 1B to a slope 1A of the monotonically increasing region 1A is more than 0 and less than 0.8,
• a series of the isotropic layers having a second monotonically increasing region of optical thickness, wherein the second monotonically increasing region comprises a monotonically increasing region 2A in which the maximum optical thickness is 200 nm or less and a monotonically increasing region 2B in which the minimum optical thickness is more than 200 nm, and a ratio 2B/2A of a slope 2B of the monotonically increasing region 2B to a slope 2A of the monotonically increasing region 2A is more than 1.5 and 10 or less.