A master recording apparatus includes a revolving base (31) for revolving a substrate (1) coated with resist thereon, an irradiating mechanism (32), an elevator mechanism (33) for making the irradiating mechanism (32) capable of moving in a vertical direction and in a surface direction which is perpendicular to the vertical direction relative to the revolving base (31) and a height position displacement mechanism (35) interposing between the irradiating mechanism (32) and the elevator mechanism (33), and in which the irradiating mechanism (32) is connected with the elevator mechanism (33) through the height position displacement mechanism (35) and the irradiating mechanism (32) has such a structure in which at least a converging lens system (36) and a displacement driving mechanism (37) for adjusting a focus are supported by a gas static pressure pad housing (38), in the gas static pressure pad housing (38) a gas feeding pad (39) is disposed facing a bottom surface opposing the substrate and gas is made to be fed between the irradiating mechanism (32) and the said substrate (1) through the gas feeding pad (39), whereby the contact between the substrate and the irradiating mechanism is avoided at a time of carrying out a recording of a predetermined pattern by irradiating a beam.