To rapidly discharge soil and sand having high stickiness even when bucket width is narrowed so that narrow ditching is carried out and excavation can be conducted efficiently while handling is simplified and facility is improved besides the decrease of the a malfunction by simple constitution and the prevention of an increase in manufacturing cost in a bucket for a shovel type excavator.

Soil and sand are excavated and removed by rocking by the expansion and contraction of a bucket cylinder 8 pivotally attached to an arm 7. An earth removing plate 5, in which the front side is attached movably to a bucket and the base end side can be undulated to the bottom plate surface of the bucket, is installed at that time, and the undulation of the earth removing plate is interlocked with the expansion and contraction of the bucket cylinder. A traction member 14, in which one end is connected to the arm while the other end is coupled onto the rear of the earth removing plate particularly and which pulls the earth removing plate to the opening side in response to the change of the relative places of each connecting section to the arm and the earth removing plate with the rocking of the bucket and has flexibility, is mounted.