A wheel loader, comprising: an engine; a working unit conf igured to be driven by means of a pressurized oil to be produced by driving of the engine; a transmission including: a case; and a rotary shaft disposed inside the case; and a lubricated part disposed on an outer peripheral part of the rotary shaft, the transmission executing switching between forward travelling and rearward travelling and gear shifting, characterized in that the transmission includes: a first oil accumulating part disposed above the lubricated part, the first oil accumulating part accumulating a scattered lubricating oil; a second oil accumulating part mounted to an end of the rotary shaft while being disposed below the first oil accumulating part, the second oil accumulating part accumulating the lubricating oil from the first oil accumulating part; a communication oil path making the first oil accumulating part and the second oil accumulating part communicate with each other; a horizontal hole formed in the rotary shaft while being axially extended, the horizontal hole communicating with the second oil accumulating part; and a lubrication oil path having a vertical hole (85a,85b), the vertical hole (85a,85b) formed in the rotary shaft while being radially extended from an outer peripheral surface of the rotary shaft, the lubricating oil path communicating with the horizontal hole, and the lubrication oil path is configured to direct the lubricating oil accumulated in the second oil accumulating part to the lubricated part when the rotary shaft is rotated at a rotational speed lower than a predetermined rotational speed. an engine; a working unit conf igured to be driven by means of a pressurized oil to be produced by driving of the engine; a transmission including: a case; and a rotary shaft disposed inside the case; and a lubricated part disposed on an outer peripheral part of the rotary shaft, the transmission executing switching between forward travelling and rearward travelling and gear shifting, characterized in that the transmission includes: a first oil accumulating part disposed above the lubricated part, the first oil accumulating part accumulating a scattered lubricating oil; a second oil accumulating part mounted to an end of the rotary shaft while being disposed below the first oil accumulating part, the second oil accumulating part accumulating the lubricating oil from the first oil accumulating part; a communication oil path making the first oil accumulating part and the second oil accumulating part communicate with each other; a horizontal hole formed in the rotary shaft while being axially extended, the horizontal hole communicating with the second oil accumulating part; and a lubrication oil path having a vertical hole (85a,85b), the vertical hole (85a,85b) formed in the rotary shaft while being radially extended from an outer peripheral surface of the rotary shaft, the lubricating oil path communicating with the horizontal hole, and a first oil accumulating part disposed above the lubricated part, the first oil accumulating part accumulating a scattered lubricating oil; a second oil accumulating part mounted to an end of the rotary shaft while being disposed below the first oil accumulating part, the second oil accumulating part accumulating the lubricating oil from the first oil accumulating part; a communication oil path making the first oil accumulating part and the second oil accumulating part communicate with each other; a horizontal hole formed in the rotary shaft while being axially extended, the horizontal hole communicating with the second oil accumulating part; and a lubrication oil path having a vertical hole (85a,85b), the vertical hole (85a,85b) formed in the rotary shaft while being radially extended from an outer peripheral surface of the rotary shaft, the lubricating oil path communicating with the horizontal hole, and the lubrication oil path is configured to direct the lubricating oil accumulated in the second oil accumulating part to the lubricated part when the rotary shaft is rotated at a rotational speed lower than a predetermined rotational speed.