In the multilayer bottle of the present invention, an outermost layer and an innermost layer are each composed of a polyester (Z1); a barrier layer is composed of a resin composition containing 40 to 99 parts by mass of a polyamide (X) and 1 to 60 parts by mass of a polyester (Z2); an alkali compound (A) is blended in the resin composition; and furthermore, the resin composition satisfies the following formulae (1) to (3). 0.01≤P≤6.5  (1) 3.2≤M≤73.1  (2) M≥29.2−0.218α  (3) In the formulae, P represents a molar concentration (μmol/g) of phosphorus atoms; M represents a molar concentration (μmol/g) of alkali (earth) metal atoms; and α represents the parts by mass of the polyamide (X) contained in the resin composition.