A handle operation assist device includes a handle angular velocity measuring unit, an error calculator and a notification unit. The handle angular velocity measuring unit is configured to measure a handle angular velocity based on an output of a sensor configured to detect an angular velocity corresponding to rotation of a fishing reel handle. The error calculator is configured to calculate an error in the handle angular velocity with respect to a reference angular velocity. The notification unit is configured to carry out notification regarding the error.本發明可向使用者引導於釣具用捲線器之握把之1圈旋轉內應使握把旋轉之速度。本發明之握把操作支援裝置具備：握把角速度測定部，其基於感測器部之輸出對握把角速度進行測定，該感測器部以檢測與釣具用捲線器之握把之旋轉相應的角速度之方式設置；誤差算出部，其算出握把角速度相對於基準角速度之誤差；及報知部，其進行與誤差相關之報知。
