A decking system including floor elements and a connecting system including a connecting device for connecting a first and a second floor element, wherein the connecting device is removably connectable to a support member. A first and a second connecting portion of the connecting device are configured to cooperate with a first and a second engagement portion, respectively, of the first and second floor elements for vertically connecting the first and second floor elements. The connecting device further includes a displaceable portion which is horizontally displaceable and is configured to assume a first and a second horizontal state, wherein a horizontal extension of the connecting device in the second horizontal state is smaller than a horizontal extension of thereof in the first horizontal state.