Ladder

The invention provides a ladder. The ladder comprises a fixed base, a pedal, a first connecting part and a second connecting part, and a third connecting part and a fourth connecting part, wherein the pedal comprises a first pedal and a second pedal; the first pedal has a first pedal first end and a first pedal second end; the first pedal first end is rotationally arranged on the fixed base; the first pedal second end is provided with a first extension part; the first extension part is rotationally connected with the second pedal first end; a first end of the first connecting part is rotationally arranged on the fixed base; a second end of the first connecting part and a first end of the second connecting part are connected in a relative rotating manner; a second end of the second connecting part is rotationally connected to the first pedal; a first end of the third connecting part is rotationally connected to the first pedal; a second end of the third connecting part and a first end of the fourth connecting part are connected in a relative rotating manner; and a second end of the fourth connecting part is rotationally connected to the second pedal. The ladder solves the problem of large occupying space when the ladder is not used.