Abstract: A blade tip-provided micropipette holding apparatus has a tubular micropipette holder so constructed that a blade tip-provided micropipette to be inserted into a living cell can be mounted on a front-end portion thereof and a holder-holding device for holding the micropipette holder. The holder-holding device has a base member and a tubular rotating member which is rotatably held by the base member and into which the tubular micropipette holder can be penetrated. The tubular rotating member has holder position adjusting mechanisms each composed of a plurality of side holes formed on a side surface of the tubular rotating member at different positions of the side surface thereof in a circumferential direction thereof and holder position adjusting members each capable of entering into the tubular rotating member from the side holes and contacting an outer surface of the micropipette holder penetrating through the tubular rotating member.