Roller skate

A roller skate, comprising:

• a frame including a sole plate for supporting a foot of a skater thereon and at least two side walls upwardly extended from two longitudinal sides of said sole plate;
• two pairs of front and rear wheels rotatably attached to two outer sides of said two side walls respectively;
• and
• an ankle securing unit, adapted for securely holding the foot of the skater on said sole plate, comprising first and second instep straps and first and second heel straps, wherein each of said first instep strap and said first heel strap has a first connecting end extended to a position between said front wheel and said rear wheel on said first side wall and said two first connecting ends of said first instep strap and said first heel strap are jointly secured to said first side wall, wherein each of said second instep strap and said second heel strap has a second connecting end extended to a position between said front wheel and said rear wheel on said second side wall and said two second connecting ends of said second instep strap and said second heel strap are jointly secured to said second side wall, wherein said first instep strap and said second instep strap are detachably connected together to form an instep loop having a predetermined length for extending over an instep of the foot of the skater and tightening around a front portion of the ankle of the skater, and that said first heel strap and said second heel strap are detachably connected together to form an heel loop having a predetermined length for extending and tightening around a back portion of the ankle of the skater, so as to substantially securely hold the foot of the skater on said sole plate by tightening around the ankle of the foot of the skater with the ankle securing unit.