An electric toothbrush for performing care on an oral cavity, the electric toothbrush including a main body portion that includes a driving unit serving as a driving source; and a vibrating member that vibrates as a result of the driving of the motor, the vibrating member including a stem portion that is anchored to the main body, and a brush component on whose tip bristles are implanted and which has a brush portion in which the bristles are disposed and a shank portion located toward the main body, the electric toothbrush comprising: the driving unit being a motor for vibrating the vibrating member; an accelerometer for outputting a signal having a waveform representing a vibration frequency of the motor and an orientation signal representing an orientation of the vibration member; a vibration frequency detection unit for detecting a vibration frequency of the vibration member based on the waveform of a signal outputted by the accelerometer; and a memory storing a table assigning the vibration frequency to a brush pressure; and a Central Processing Unit, CPU, including a brush pressure estimation unit for estimating the brush pressure, the brush pressure estimation unit including a dynamic acceleration component processing unit, a static acceleration component processing unit and a table searching unit configured to detect the brush pressure by searching the table and configured to output the result, wherein a member pressure representing a load acting on the vibrating member is detected based on the vibration frequency detected by the vibration frequency detection unit, and wherein the vibration frequency detection unit is configured to detect the member pressure based on a difference between the vibration frequency caused by rotation of the motor when the motor is unloaded and the vibration frequency detected by the vibration frequency detection unit when the motor is under load using the table which correlates the member pressure with the vibration frequency, such that, as the vibration frequency detected by the vibration frequency detection unit decreases, the brush pressure increases. a stem portion that is anchored to the main body, and a brush component on whose tip bristles are implanted and which has a brush portion in which the bristles are disposed and a shank portion located toward the main body, the driving unit being a motor for vibrating the vibrating member; an accelerometer for outputting a signal having a waveform representing a vibration frequency of the motor and an orientation signal representing an orientation of the vibration member; a vibration frequency detection unit for detecting a vibration frequency of the vibration member based on the waveform of a signal outputted by the accelerometer; and a memory storing a table assigning the vibration frequency to a brush pressure; and a Central Processing Unit, CPU, including a brush pressure estimation unit for estimating the brush pressure, the brush pressure estimation unit including a dynamic acceleration component processing unit, a static acceleration component processing unit and a table searching unit configured to detect the brush pressure by searching the table and configured to output the result,