To provide ultrasonic processing equipment having no difficulty in performing continuous work over a long time, by installing an ultrasonic machining tool in a hone by a simple means, without using solder and wax.

In this ultrasonic processing equipment, the ultrasonic machining tool is installed in the hone; the relative size I in a joining part of the ultrasonic machining tool and the hone satisfies the following general equation; and the ultrasonic machining tool and the hone are joined by using an organic adhesive. 0<I≤1/4I=StρtCt×tan(2π1t/λt)/S1ρ1C1 is realized. Here, St represents the cross-sectional area of the ultrasonic machining tool in the joining part of the ultrasonic machining tool and the hone. S1 represents the cross-sectional area of the horn in the joining part of the ultrasonic machining tool and the hone. ρt represents density of a tool material for ultrasonic machining. ρ1 represents density of a hone material. Ct represents a sound speed in the tool material for ultrasonic machining. C1 represents a sound speed in the hone material. 1t represents the axial directional length of the ultrasonic machining tool. λt represents a wave length of ultrasonic vibration in the ultrasonic machining tool.