According to an embodiment, an activity meter registers, based on an acceleration sensor and an output signal of the acceleration sensor when a tapping operation is performed, information on the tapping operation, detects generation of a tapping operation identical to the tapping operation corresponding to the registered information from the output signal of the acceleration sensor, and stores, when generation of the tapping operation identical to the tapping operation corresponding to the registered information is detected, time information when the identical tapping operation is generated in a memory.[技術領域]關於活動量計及事件資訊記錄系統。[發明所欲解決之課題]提供一種藉由輕觸操作,可簡單進行所希望的事件的記錄的活動量計。[用以解決課題之手段]實施形態之活動量計(1)係具有:加速度感測器(11),根據被進行輕觸操作時的加速度感測器(11)的輸出訊號,登錄有關輕觸操作的資訊;由加速度感測器(11)的輸出訊號,檢測和與所被登錄的資訊相對應的輕觸操作為相同的輕觸操作的發生;被檢測到發生和與所被登錄的資訊相對應的輕觸操作為相同的輕觸操作時,將發生相同輕觸操作時的時刻資訊記憶在記憶體(13)。
