Abstract: A carrier device includes a supporting base having one or more columns, a mounting seat for supporting an object and having an arm, and a linkage for adjustably coupling and supporting the mounting seat to the supporting base to the selected angular positions without spring members. Two or more fastener each include a non-circular shank engaged through one or more discs, and a pair of levers are disposed parallel to each other and pivotally coupled between the fasteners for forming a parallelogrammic structure and for adjustably and stably supporting the mounting seat to the columns of the supporting base at selected angular position.