A puncturing device, a blood testing device, and a puncturing method, in which the remaining number of times of puncturing and the remaining number of times of blood testing are displayed. A laser puncturing device (100) has a measuring section (153) for measuring electric power consumed by a single puncturing operation, a measuring section (154) for measuring the residual amount of battery power, and a measuring section (157) for measuring electric power consumed by a laser emission device (110). A calculating section (156) calculates the performable remaining number of times of puncturing based on the measured remaining amount of battery power and measured electric power consumption. A control section (151) displays the calculated remaining number of times of puncturing on a display section (160). Further, the blood testing device (200) calculates the performable number of times of blood testing based on the measured remaining amount of battery power and measured electric power consumption and displays the calculated number of times of blood testing on a display section (260).
