Provided are: a powder composition comprising a polyamide powder (A) and an inorganic reinforcing material (B), in which the polyamide powder (A) has a D50 particle diameter of 1 to 100 μm inclusive and a sphericity of 80 to 100 inclusive, the inorganic reinforcing material (B) has an average major axis diameter of 3 to 300 μm inclusive and an (average major axis diameter)/(average minor axis diameter) ratio of 1 to 15 inclusive, and the inorganic reinforcing material (B) is contained in an amount of 5 to 60% by weight inclusive relative to the whole weight of the powder composition; a method for producing a three-dimensionally shaped article by a powder bed melt bonding process using the powder composition; and a three-dimensionally shaped article. The powder composition comprises a specific polyamide powder and a specific inorganic reinforcing material, and therefore has high fluidability and can keep the fluidability thereof at a satisfactory level when recycled and used. When the powder composition is used for three-dimensional shaping, a shaped article having both of surface smoothness and high elastic modulus can be produced.