A polypropylene-based resin multilayer film, comprising: a base layer consisting of a polypropylene-based resin composition; a surface layer consisting of a polypropylene-based resin composition on one side of the base layer; and a seal layer consisting of a polypropylene-based resin composition on the other side of the base layer, the polypropylene-based resin multilayer film satisfying the following a) to d): a) A heat shrinkage ratio in a longitudinal direction at 120°C of 3.0 % or less, wherein the heat shrinkage ratio is determined by cutting a sample with 20 mm in width and 200 mm in length from the film, hanging the sample in a hot air oven at 120°C and heating it for 5 minutes, measuring the length of the heated sample to obtain the reduced length due to shrinkage and determining the ratio of the reduced length to the length of the sample before being heated as the heat shrinkage ratio at 120°C; b) An onset temperature of heat seal strength of the seal layer of 100°C or higher and 115°C or lower, wherein the onset temperature of heat seal strength of the seal layer is measured as defined in the specification as a temperature at which heat seal strength becomes 1 N/15mm when two surfaces of the seal layer of a polypropylene-based resin multilayer film are placed face-to-face, and then heat sealed under a heat seal pressure 1 kg/cm 2 for 1 second using a thermal gradient tester; c) An onset temperature of heat seal strength of the surface layer of 125 °C or higher and 140°C or lower, wherein the onset temperature of heat seal strength of the seal layer is measured as defined in the specification as a temperature at which heat seal strength becomes 1 N/15mm when two surfaces of the seal layer of a polypropylene-based resin multilayer film are placed face-to-face, and then heat sealed under a heat seal pressure 1 kg/cm 2 for 1 second using a thermal gradient tester; and d) A thickness of the seal layer in the range of 5% or more and 15% or less with respect to a total thickness of the film. a base layer consisting of a polypropylene-based resin composition; a surface layer consisting of a polypropylene-based resin composition on one side of the base layer; and a seal layer consisting of a polypropylene-based resin composition on the other side of the base layer, the polypropylene-based resin multilayer film satisfying the following a) to d): a) A heat shrinkage ratio in a longitudinal direction at 120°C of 3.0 % or less, wherein the heat shrinkage ratio is determined by cutting a sample with 20 mm in width and 200 mm in length from the film, hanging the sample in a hot air oven at 120°C and heating it for 5 minutes, measuring the length of the heated sample to obtain the reduced length due to shrinkage and determining the ratio of the reduced length to the length of the sample before being heated as the heat shrinkage ratio at 120°C; b) An onset temperature of heat seal strength of the seal layer of 100°C or higher and 115°C or lower, wherein the onset temperature of heat seal strength of the seal layer is measured as defined in the specification as a temperature at which heat seal strength becomes 1 N/15mm when two surfaces of the seal layer of a polypropylene-based resin multilayer film are placed face-to-face, and then heat sealed under a heat seal pressure 1 kg/cm 2 for 1 second using a thermal gradient tester; c) An onset temperature of heat seal strength of the surface layer of 125 °C or higher and 140°C or lower, wherein the onset temperature of heat seal strength of the seal layer is measured as defined in the specification as a temperature at which heat seal strength becomes 1 N/15mm when two surfaces of the seal layer of a polypropylene-based resin multilayer film are placed face-to-face, and then heat sealed under a heat seal pressure 1 kg/cm 2 for 1 second using a thermal gradient tester; and d) A thickness of the seal layer in the range of 5% or more and 15% or less with respect to a total thickness of the film. a) A heat shrinkage ratio in a longitudinal direction at 120°C of 3.0 % or less, wherein the heat shrinkage ratio is determined by cutting a sample with 20 mm in width and 200 mm in length from the film, hanging the sample in a hot air oven at 120°C and heating it for 5 minutes, measuring the length of the heated sample to obtain the reduced length due to shrinkage and determining the ratio of the reduced length to the length of the sample before being heated as the heat shrinkage ratio at 120°C; b) An onset temperature of heat seal strength of the seal layer of 100°C or higher and 115°C or lower, wherein the onset temperature of heat seal strength of the seal layer is measured as defined in the specification as a temperature at which heat seal strength becomes 1 N/15mm when two surfaces of the seal layer of a polypropylene-based resin multilayer film are placed face-to-face, and then heat sealed under a heat seal pressure 1 kg/cm 2 for 1 second using a thermal gradient tester; c) An onset temperature of heat seal strength of the surface layer of 125 °C or higher and 140°C or lower, wherein the onset temperature of heat seal strength of the seal layer is measured as defined in the specification as a temperature at which heat seal strength becomes 1 N/15mm when two surfaces of the seal layer of a polypropylene-based resin multilayer film are placed face-to-face, and then heat sealed under a heat seal pressure 1 kg/cm 2 for 1 second using a thermal gradient tester; and d) A thickness of the seal layer in the range of 5% or more and 15% or less with respect to a total thickness of the film.