Method of producing ceramic manufactured object

A method of producing a ceramic manufactured object, comprising repeatedly performing:

• (i) a step of leveling a ceramic powder to form a powder layer;
• and
• (ii) a step of irradiating the powder layer with a scanned laser beam being scanned based on three-dimensional data to melt an irradiated site of the powder layer and then solidifying the irradiated site to form a solidified portion;
• wherein a focal position of the scanned laser beam formed by a laser focusing optical system is shifted from a surface of the powder layer, and the solidified portion includes a crystalline region and an amorphous region smaller than the crystalline region,
• wherein the crystalline region and the amorphous region contains at least one oxide in common,
• wherein in the step (ii), the surface of the powder layer is irradiated with the laser beam so that a ratio D/L falls within a range of 0.2≤D/L≤0.7, thereby suppressing formation of an amorphous substance, and
• wherein (L) represents the width of fusion and (D) represents the depth of the fusion at the solidified portion formed by one-line scan irradiation of the power layer with the scanned laser beam.