Provided is a self-standing packaging bag in which paper is used as a base material of a body part and which has excellent drop resistance. A self-standing packaging bag according to one aspect of the present disclosure is formed by heat-sealing a pair of body portions including a first substrate layer and a first heat seal layer, respectively, and a bottom tape including a second substrate layer and a second heat seal layer and having a ridge fold, A pair of side seal portions adhered in a longitudinal direction of the self-standing packaging bag, and a bottom seal portion adhered with a pair of body portions and a bottom tape in a lateral direction of the self-standing packaging bag, wherein the first base material layer is a paper base material, The second base material layer is a resin film, and a ratio a/L of a minimum width a of the...

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