Polyamide pre-expanded particles, and polyamide foam molded article and method of producing the same

Polyamide pre-expanded particles,

• having a peak temperature of a maximum endothermic peak of 150° C. or higher and 275° C. or lower on a DSC curve obtained while being heated from 30° C. to 280° C. under a condition of a heating rate of 10° C./min using a differential scanning calorimeter,
• wherein a width of the maximum endothermic peak is 30° C. or greater and 80° C. or smaller when a straight line approximating the DSC curve on a high temperature side relative to the maximum endothermic peak after an end of melting is used as a baseline, the width corresponding to a difference between an extrapolated melting start temperature which is a temperature at an intersection point between a tangent line at an inflection point of the maximum endothermic peak on a low temperature side and the baseline, and an extrapolated melting end temperature which is a temperature at an intersection point between a tangent line at an inflection point of the maximum endothermic peak on a high temperature side and the baseline.