An image formation apparatus has a waste toner accommodation unit including a toner transporting rotation member covered with a fixed pipe. As the member rotates, waste toner in the pipe is transported downstream A fin involved in detecting an amount of toner moves upward and downward with a predetermined amplitude as the member rotates. The pipe has a projection secured by an elastic member to a bottom of the waste toner accommodation unit, and when waste toner reaches the level of the pipe, the waste toner is compressed in the pipe downstream and thus increases in density, and together with the waste toner the pipe starts to rotate. As a result, the projection rotates to a position allowing it to interfere with the fin, and the fin decreases in amplitude. Such variation in amplitude is detected by a sensor and a state full of toner is thus detected.