The disclosure relates to a solid-state imaging element, a driving method, and an electronic device that generates an arbitrary intermediate voltage level between a high voltage level and a low voltage level. The solid-state imaging element includes a first driving line that supplies selectively to a posterior stage, a first voltage level that is output from a first power source and a second voltage level that is output from a second power source and lower than the first voltage level. Also included is a second driving line that is different from the first driving line, a capacitance that is formed between the first driving line and the second driving line, and a floating setting unit that sets the first driving line to a floating state. The disclosure is applicable to, for example, a CMOS image sensor.