Skateboard

A skateboard adapted to be propelled by twisting, said skateboard comprising a board body with opposite first and second central ends and a propelling wheel assembly connected to said board body for moving on a ground surface;

• wherein said board body has a first section extending from said first central end and a second section extending from said first section to said second central end, said propelling wheel assembly including at least a first wheel set pivotally connected to a first bottom of said first section facing said ground surface, at least two second wheel sets pivotally connected to a second bottom of said second section facing said ground surface, and a control set installed on each of said at least two second wheel sets, said first section having a first top opposite to said first bottom, said second section having a second top opposite to said second bottom, said first wheel set having a first base meeting said first bottom at a first joint and projecting from said first bottom, a first holder connected to said first base, and a first wheel pivotally disposed on said first holder, each of said at least two second wheel sets having a second base meeting said second bottom at a second joint and projecting from said second bottom, a second holder connected to said second base, a second wheel pivotally disposed on said second holder, and a pair of opposite grooves formed on said second holder, said control set being installed on said second holder of each of said at least two second wheel sets and having a pair of limit units each disposed at one end of each of said pair of grooves, a pair of engagement units penetrating said pair of opposite grooves and said second wheel and engaged together, and a pair of elastic units sleevedly disposed on said pair of engagement units and capable of being compressed between said pair of engagement units and said pair of limit units,
• a horizontal line passing through said first joint and through said second joint respectively and being parallel to said ground surface, said first base being inclined to said horizontal line at a first angle ranging from 5 to 35 degrees, each of said second bases of said at least two second wheel sets being inclined to said horizontal line at a second angle ranging from 5 to 35 degrees, two reference lines being defined, each of said two reference lines passing through a center of any one of said second bases of said at least two second wheel sets, said board body defining a baseline passing axially from said first central end to said second central end and through a center of said board body, a third angle being formed between said reference line and said baseline and being not more than 60 degrees, said first wheel set being placed in said baseline.