A retractable bed apparatus comprising: (a) enclosure frame means; (b) mattress frame guide means positioned within said enclosure frame means; (c) a flexible mattress frame engaged with said guide means, having a retracted position wherein said mattress frame is received completely within said enclosure frame means, and having a sleeping position wherein said mattress frame is extended from said enclosure frame means; (d) a mattress affixed to said mattress frame; (e) a motor bracket pivotally connected to said enclosure frame means; (f) a rotary motor mounted on said bracket; (g) an elongated threaded shaft extending from said bracket and drivingly engaged with said motor; (h) nut means pivotally connected to said mattress frame and in threaded engagement with said shaft; and (i) motor control means connecting said motor to a source of power to selectively rotate said shaft to displace said mattress frame to thereby effect the substantially complete extension of said mattress frame from said enclosure frame means and the retraction of said mattress frame into said enclosure frame means.