To obtain a simple structural apparatus for producing a crystal, capable of producing the crystal in high quality and having a large diameter, and further to provide a producing method thereof.

This apparatus for producing a crystal, capable of growing a crystal by melting a raw material 7, which is a crystalline material, in a crucible 1 and cooling the melted raw material to crystallize the raw material 7 and grow the crystal has a side face heater 3, which is a heating means, installed in parallel with a distance between the heater and the crucible 1, and a ceiling plate 11 arranged at the upper part of the crucible 1 and at the lower part of the upper ends of the heating means 3 with the distance between the ceiling plate 11 and the crucible 1, and can grow the crystal of the raw material 7 in the crucible 1 by changing the relative distance between the upper end of the heating means 3 and the upper end of the crucible 1 in the upper and lower direction.