Abstract: An electric cradle including a crib, a main support disposed under the crib to support the crib and two swinging frames pivotally connecting the main support with two ends of the crib. A swinging mechanism is used to swing the swinging frames so as to swingingly drive the crib to form an electric cradle. The two swinging frames can be alternatively removed from the crib and the length of the main support can be adjusted in order to permit direct securing of the two ends of the crib to the main support. In addition, the height of the side fences of the cribs can be adjusted to meet the standing height of an infant, whereby the electric cradle can be transformed into a fixed crib.