A portable and foldable bed is disclosed, in which a support strength of a rotation support leg is enhanced by installing a triangle support plate at an engaged portion between a rotation pole of a rotation support leg and a connection bar, and a fixing plate with a width twice the width of a bed frame is provided in a bed frame engagement unit of a fixing support leg, and a closer contact unit is provided between the fixing plate and the fixing support leg for thereby obtaining a stable engagement of the same, and a foldable spring is disposed between a lower horizontal bar of a center support par and an outer frame of a bed frame, so a folding operation can be easily performed during a folding operation of a bed.