Working machine

A working machine comprising:

• a machine body having a front-rear direction and a right-left direction perpendicular to the front-rear direction, the machine body having a right side and a left side opposite to the right side in the right-left direction;
• a cabin mounted in the machine body between the right side and the left side;
• a right traveling device arranged on the right side of the machine body;
• a left traveling device arranged on the left side of the machine body;
• a boom having a front end part in the front-rear direction, the front end part being to be connected to a working tool;
• a first wall provided on a first side of the boom in the right-left direction;
• a second wall provided on a second side opposite to the first side with respect to the boom in the right-left direction;
• a bottom plate provided between the first wall and the second wall;
• and
• a urea aqueous solution tank being provided on the bottom plate between the first wall and the second wall to store a urea aqueous solution, the urea aqueous solution tank having a discharge portion from which the urea aqueous solution is discharged, the bottom plate having an opening portion opposite to the discharge portion and having a lid plate to close the opening portion.

A working machine comprising:

• a machine body having a front-rear direction and a right-left direction perpendicular to the front-rear direction, the machine body having a right side and a left side opposite to the right side in the right-left direction;
• an engine mounted in the machine body;
• a cabin mounted in the machine body between the right side and the left side;
• a right traveling device arranged on the right side of the machine body;
• a left traveling device arranged on the left side of the machine body;
• a boom having a front end part in the front-rear direction, the front end part being to be connected to a working tool;
• a first wall provided on a first side of the boom in the right-left direction;
• a second wall provided on a second side opposite to the first side with respect to the boom in the right-left direction;
• a fuel tank mounted in the machine body and comprising:
• a fuel tank main body to store fuel to be supplied to the engine;
• and
• a first feeding pipe having a first feeding port from which the fuel is fed to the fuel tank main body through the first feeding pipe;
• and
• a urea aqueous solution tank provided between the first wall and the second wall to store a urea aqueous solution, the urea aqueous solution tank comprising:
• a urea aqueous solution tank main body to store the urea aqueous solution;
• and
• a second feeding pipe having a second feeding port from which the urea aqueous solution is fed to the urea aqueous solution tank main body through the second feeding pipe, both of the first feeding port and the second feeding port being provided on the right side or the left side of the machine body.