Mattress

A mattress for preventing a user lying thereon from falling from the mattress, comprising:

• a spring unit (12) including a plurality of coil springs arranged in parallel with one another;
• an elastomeric layer (18;19) disposed at least on one of the top and bottom of the spring unit (12) and wrapped with an outer covering (20;
• 22,23), whereon a user is to lie;
• fall preventing means disposed at least on the top side of the elastomeric layer, said fall preventing means including a pair of ridges (34) of elastomeric material extending in the longitudinal direction of the elastomeric layer and protruding from the elastomeric layer, each ridge (34) of said fall preventing means having a sectional shape including a partial circle and being harder than the elastomeric layer, and each ridge of said fall preventing means being interposed between the outer covering (20;
• 22,23) and the elastomeric layer (18;19);
• and
• connecting means (30,31;
• 42) one end of which is connected to the outer covering (20;22, 23) and the other end of which is connected to the coil springs of the spring unit (12), each ridge (34) being fixed to said connecting means intermediate the connection to the outer covering and the connection to the coil springs;
• whereby the user lying on the elastomeric layer on which said fall preventing means is disposed will be prevented from falling from the mattress.