Floor mat and working machine

A floor mat arranged in a working machine including:

• a floor portion;
• a wall portion arranged on a circumferential portion of the floor portion;
• and an opening portion arranged on a part of a first connecting portion connecting the wall portion to the floor portion, characterized in that
• the floor mat comprises:
• a mat main body arranged on the floor portion;
• a covering portion configured to cover the opening portion;
• and
• a second connecting portion configured to connect the covering portion flexibly to a circumferential portion of the mat main body,
• wherein the covering portion includes:
• a first cover wall portion having:
• a side portion connected to the second connecting portion;
• and
• a first opposite side portion and a second opposite side portion each extending from end portions of the side portion and being opposite to each other;
• a second cover wall portion extending downward from the first opposite side portion;
• and
• a third cover wall portion extending downward from the second opposite side portion,
• and wherein a length of the second cover wall portion from a portion connecting to the first opposite side portion to a lower end portion of the second cover wall portion is equal to or less than a thickness of the mat main body, and a length of the third cover wall portion from a portion connecting to the second opposite side portion to a lower end portion of the third cover wall portion is equal to or less than the thickness of the mat main body.