A methacrylic resin composition comprising three or more methacrylic resins having different weight average molecular weights from each other and satisfying the following conditions, and: when a proportion (%) of a peak area from a starting point to a molecular weight of 30000 with respect to a peak area from the starting point to an end point in a differential molecular weight distribution curve of the methacrylic resin composition is represented by W1, a value of the W1 satisfies an expression: 18≤W1≤27; when a proportion (%) of a peak area from the starting point to a molecular weight of 80000 with respect to the peak area from the starting point to the end point in the differential molecular weight distribution curve of the methacrylic resin composition is represented by W2, a value of the W2 satisfies an expression: 41≤W2≤52; and when a proportion (%) of a peak area from a molecular weight of 300000 to the end point with respect to the peak area from the starting point to the end point in the differential molecular weight distribution curve of the methacrylic resin composition is represented by W3, a value of the W3 satisfies an expression: 10≤W3≤14, wherein the W1, W2 and W3 in the above described conditions, and are determined according to JIS K 7252-1 to 4 (Determination of average molecular weight and molecular weight distribution of polymer by plastic-size exclusion chromatography - Part 1 to Part 4) with the use of conventionally known size exclusion chromatography such as gel permeation chromatography; and wherein the methacrylic resins include a monomer unit derived from an alkyl methacrylate, and a content of the monomer unit derived from an alkyl methacrylate is 98.4 wt% or more with respect to 100 wt% of all monomer units contained in the methacrylic resins, wherein the content of alkyl methacrylate unit means a total of the contents of the alkyl methacrylate units contained in each of the methacrylic resins, and the 100 wt% of all monomer units contained in the methacrylic resins means that a total amount of all monomer units contained in each of the methacrylic resins is assumed to be 100 wt%. when a proportion (%) of a peak area from a starting point to a molecular weight of 30000 with respect to a peak area from the starting point to an end point in a differential molecular weight distribution curve of the methacrylic resin composition is represented by W1, a value of the W1 satisfies an expression: 18≤W1≤27; when a proportion (%) of a peak area from the starting point to a molecular weight of 80000 with respect to the peak area from the starting point to the end point in the differential molecular weight distribution curve of the methacrylic resin composition is represented by W2, a value of the W2 satisfies an expression: 41≤W2≤52; and when a proportion (%) of a peak area from a molecular weight of 300000 to the end point with respect to the peak area from the starting point to the end point in the differential molecular weight distribution curve of the methacrylic resin composition is represented by W3, a value of the W3 satisfies an expression: 10≤W3≤14, wherein the W1, W2 and W3 in the above described conditions, and are determined according to JIS K 7252-1 to 4 (Determination of average molecular weight and molecular weight distribution of polymer by plastic-size exclusion chromatography - Part 1 to Part 4) with the use of conventionally known size exclusion chromatography such as gel permeation chromatography; and wherein the methacrylic resins include a monomer unit derived from an alkyl methacrylate, and a content of the monomer unit derived from an alkyl methacrylate is 98.4 wt% or more with respect to 100 wt% of all monomer units contained in the methacrylic resins, wherein the content of alkyl methacrylate unit means a total of the contents of the alkyl methacrylate units contained in each of the methacrylic resins, and the 100 wt% of all monomer units contained in the methacrylic resins means that a total amount of all monomer units contained in each of the methacrylic resins is assumed to be 100 wt%. wherein the W1, W2 and W3 in the above described conditions, and are determined according to JIS K 7252-1 to 4 (Determination of average molecular weight and molecular weight distribution of polymer by plastic-size exclusion chromatography - Part 1 to Part 4) with the use of conventionally known size exclusion chromatography such as gel permeation chromatography; and wherein the methacrylic resins include a monomer unit derived from an alkyl methacrylate, and a content of the monomer unit derived from an alkyl methacrylate is 98.4 wt% or more with respect to 100 wt% of all monomer units contained in the methacrylic resins, wherein the content of alkyl methacrylate unit means a total of the contents of the alkyl methacrylate units contained in each of the methacrylic resins, and the 100 wt% of all monomer units contained in the methacrylic resins means that a total amount of all monomer units contained in each of the methacrylic resins is assumed to be 100 wt%.