LIQUID LEVEL DETECTION DEVICE

Provided is a liquid level detection device which is configured so that an arm can be easily mounted to a holder after the holder is pivotably mounted using a cover and a main body portion. An end of a float arm (6) is bent at a substantially right angle, and the end side of the float arm (6) is defined as a first end portion (6a). The portion of the float arm (6) which is located closer to the center of the float arm (6) than the first end portion (6a) is defined as a second end portion (6b). A first arm mounting portion (21) to which the first end portion (6a) is affixed and second arm mounting portions (22, 23) to which the second end portion (6b) is affixed are provided to a holder (2). A stopper (1e) for restricting the pivot range of the holder (2) is provided to a main body portion (1). A first stopper (24) which comes into contact with the stopper (1e) is provided to the holder (2). The first arm mounting portion (21) and the first stopper (24) are provided on a line passing through the pivot axis (S) of the holder (2) and perpendicular to the pivot axis (S).