Hose clamping structure and working machine

The hose clamping structure is provided with: a vertical plate (49) having an opening (53); a groove section (50) that is provided adjacent to the opening section (53) on a back surface (49f) side on one side of the plate surface parallel direction (W1) with respect to the opening section (53) of the vertical plate (49), and that opens toward the opening section (53) side in the plate surface parallel direction (W1); a receiving part (51) provided on the back surface (49f) side of the other side in the plate surface parallel direction (W1) with respect to the opening part (53) of the vertical plate (49); a first clamping member (58) inserted into the groove portion (50); a second clamping member (59) which is formed of an elastic member, is disposed so as to abut against the receiving section (51) from the front surface side of the vertical plate (49) via the opening (53) in a state where the first clamping member (58) is inserted into the groove section (50), and clamps, together with the first clamping memb