Work equipment, comprising: a work equipment main body including a first travel unit (24, 26), a first travel drive unit configured to drive the first travel unit (24, 26), a first energy source configured to supply energy to the first travel drive unit, and a cutting blade device for mowing; and a grass container device including a second travel unit (74, 76), a second travel drive unit configured to drive the second travel unit (74, 76), a second energy source configured to supply energy to the second travel drive unit, and a grass receiving chamber configured to store mowed grass clippings from the cutting blade device, the grass container device being detachably connected to the work equipment main body and being configured to travel by itself in a detached state by using the second travel unit (74, 76), characterized in that the grass container device further includes an undercarriage carrying the second travel unit (74, 76), the second travel drive unit and the second energy source, a grass container provided on the undercarriage so as to be tiltable around a laterally extending tilting center line and forming the grass receiving chamber, a gate plate configured to open and close a grass discharge opening provided in the grass container, and a tilt drive unit configured to tilt the grass container around the tilting center line, and the gate plate is supported by the undercarriage at a lower end of the gate plate so as to be pivotable around a rotational center line extending laterally along a lower edge of the grass discharge opening such that the gate plate is configured to serve as a chute when opening the grass discharge opening, wherein the gate plate is pivotally provided on the undercarriage such that the rotational center line coincides with the tilting center line of the grass container. a work equipment main body including a first travel unit (24, 26), a first travel drive unit configured to drive the first travel unit (24, 26), a first energy source configured to supply energy to the first travel drive unit, and a cutting blade device for mowing; and a grass container device including a second travel unit (74, 76), a second travel drive unit configured to drive the second travel unit (74, 76), a second energy source configured to supply energy to the second travel drive unit, and a grass receiving chamber configured to store mowed grass clippings from the cutting blade device, the grass container device being detachably connected to the work equipment main body and being configured to travel by itself in a detached state by using the second travel unit (74, 76), characterized in that the grass container device further includes an undercarriage carrying the second travel unit (74, 76), the second travel drive unit and the second energy source, a grass container provided on the undercarriage so as to be tiltable around a laterally extending tilting center line and forming the grass receiving chamber, a gate plate configured to open and close a grass discharge opening provided in the grass container, and a tilt drive unit configured to tilt the grass container around the tilting center line, and the gate plate is supported by the undercarriage at a lower end of the gate plate so as to be pivotable around a rotational center line extending laterally along a lower edge of the grass discharge opening such that the gate plate is configured to serve as a chute when opening the grass discharge opening, wherein the gate plate is pivotally provided on the undercarriage such that the rotational center line coincides with the tilting center line of the grass container.