A charger for a microphone which has power supply side terminal pins that are brought into contact with charging terminals (141,142) provided on a bottom surface of a grip portion of the microphone and which charges a secondary battery built into the microphone from the power supply side terminal pins via the charging terminals (141,142), the charger comprising: a case which has on its upper surface a grip insertion hole into which a lower end portion of the grip portion is inserted, wherein a pin support stand which supports the power supply side terminal pins at a predetermined lower position within the grip insertion hole such that the power supply side terminal pins exhibit in the grip insertion hole; a pin protection part, which has a pin insertion hole into which the power supply side terminal pins are inserted, and which is up/down moveable along the grip insertion hole at a position above the pin support stand; and an up/down guide means for guiding the pin protection part between an elevated position and a lowered position, are provided in the case, and wherein the up/down guide means is characterised in comprising: a guide arm which has a rotating shaft horizontal to its upper end and which is provided with at its lower end a leg portion having a first sloping surface to move the pin protection part up and down, the guide arm being mounted at a predetermined position outside the grip insertion hole within the case so as to be rotatable around the rotating shaft such that the leg portion moves toward or away from the pin protection part; and a biasing means to bias the guide arm such that the leg portion moves toward the pin protection part side, and wherein the guide arm is provided with a protrusion which is retractable relative to the grip insertion hole and which is pressed back in a retraction direction by the grip portion being inserted into the grip insertion hole to thereby make the pin protection part movable to the lowered position. a case which has on its upper surface a grip insertion hole into which a lower end portion of the grip portion is inserted, wherein a pin support stand which supports the power supply side terminal pins at a predetermined lower position within the grip insertion hole such that the power supply side terminal pins exhibit in the grip insertion hole; a pin protection part, which has a pin insertion hole into which the power supply side terminal pins are inserted, and which is up/down moveable along the grip insertion hole at a position above the pin support stand; and an up/down guide means for guiding the pin protection part between an elevated position and a lowered position, are provided in the case, and wherein the up/down guide means is characterised in comprising: a guide arm which has a rotating shaft horizontal to its upper end and which is provided with at its lower end a leg portion having a first sloping surface to move the pin protection part up and down, the guide arm being mounted at a predetermined position outside the grip insertion hole within the case so as to be rotatable around the rotating shaft such that the leg portion moves toward or away from the pin protection part; and a biasing means to bias the guide arm such that the leg portion moves toward the pin protection part side, and a guide arm which has a rotating shaft horizontal to its upper end and which is provided with at its lower end a leg portion having a first sloping surface to move the pin protection part up and down, the guide arm being mounted at a predetermined position outside the grip insertion hole within the case so as to be rotatable around the rotating shaft such that the leg portion moves toward or away from the pin protection part; and a biasing means to bias the guide arm such that the leg portion moves toward the pin protection part side, and wherein the guide arm is provided with a protrusion which is retractable relative to the grip insertion hole and which is pressed back in a retraction direction by the grip portion being inserted into the grip insertion hole to thereby make the pin protection part movable to the lowered position.