A linear motion guide device includes a slider slidably attached onto a guide rail, an end cap and a wiper attached to the slider, the wiper includes one or more pegs engaged with the end cap for anchoring the wiper to the end cap, and includes one or more latches for resiliently engaging with the end cap and for detachably anchoring the wiper to the end cap and for allowing the wiper to be easily and readily attached to the end cap or disengaged from the end cap without additional tools, the end cap includes a shoulder formed in the outer peripheral portion, and the wiper includes an outer peripheral fence for engaging with the peripheral shoulder of the end cap and for anchoring the wiper to the end cap.