PROBLEM TO BE SOLVED: To provide an ultrasonic device, an ultrasonic module, and an ultrasonic measurement instrument which can achieve both reduction in size, and improvement in detection accuracy on a high-order harmonic.SOLUTION: An ultrasonic device 4 includes: a plurality of ultrasonic transmission units 42 for transmitting an ultrasonic wave of a fundamental wave； and a plurality of ultrasonic reception units 43 capable of receiving a secondary harmonic for the fundamental wave. The plurality of ultrasonic transmission units 42 and the plurality of ultrasonic reception units 43 are arranged along an X direction. The plurality of ultrasonic reception units 43 are arranged at a first interval L according to the order of the secondary harmonic, and one transmission channel T is composed of N ultrasonic transmission units 42. The N ultrasonic transmission units 42 constituting the transmission channel T are connected to each other, and the transmission channel T is arranged at a second interval 2L which is twice the first interval L.SELECTED DRAWING: Figure 6【課題】小型化と、高次高調波の検出精度の向上とを両立可能な超音波デバイス、超音波モジュール、及び超音波測定機を提供する。【解決手段】超音波デバイス４は、基本波の超音波を送信する複数の超音波送信部４２と、基本波に対する２次高調波を受信可能な複数の超音波受信部４３と、を備え、複数の超音波送信部４２及び複数の超音波受信部４３は、Ｘ方向に沿って配置され、複数の超音波受信部４３は、２次高調波の次数に応じた第一間隔Ｌにて配置され、Ｎ個の超音波送信部４２により１つの送信チャンネルＴが構成され、当該送信チャンネルＴを構成するＮ個の超音波送信部４２は、互いに結線され、送信チャンネルＴが、第一間隔Ｌの２倍となる第二間隔２Ｌで配置される。【選択図】図６
