A manufacturing method of a glass plate having holes, includes: (1) having a first surface of a glass base material irradiated with a laser, to form initial holes each having a first initial opening, wherein each initial hole is an initial through hole or non-through hole, wherein the first initial opening has a maximum dimension .sub.1S of 5 m or greater, and wherein in each initial hole, denoting a depth as d.sub.1, an aspect ratio (d.sub.1/.sub.1S) is 15 or greater; and (2) etching the glass base material with an alkaline solution, to form processed holes from the initial holes, wherein each processed hole has a first opening on the first surface, and wherein the first opening has a diameter .sub.1 defined as an average of diameters of circumscribed and inscribed circles of the first opening, and a roundness P.sub.1, and a ratio P.sub.1/.sub.1 is 10% or less.

When a laser beam is used to perform shape processing on an edge surface of a disk-shaped glass plate, in order to suppress strain (retardation values) in the main surface of the glass plate, the disk-shaped glass plate is floated above a base, and the edge surface of the glass plate is processed into a target shape by irradiating the edge surface with the laser beam while contactlessly heating the glass plate in a state where the glass plate is floated, and moving the laser beam relative to the edge surface in the circumferential direction of the disk-shaped glass plate.