Massaging device

A massaging device, comprising:

• a base part;
• a plurality of vibrators configured to be brought into contact with target parts of a user and to massage the target parts with vibration;
• and
• a plurality of springs each including a first end fixed to the base part and a second end attached to a corresponding one of the vibrators,
• wherein the springs have different spring constants that are set based on skin stress obtained by pressing skin of the target parts,
• wherein each of the vibrators includes plural protrusions formed thereon to contact a corresponding one of the target parts and the protrusions are arranged at intervals greater than or equal to 1 mm and less than or equal to 5 mm, and
• wherein the spring constant of a first spring of the springs corresponding to a first target part of the target parts of an area on and near a cheek bone of the user is greater than or equal to 1.0 N/mm, the spring constant of a second spring of the springs corresponding to a second target part of the target parts of an area on and near an upper jawbone of the user is greater than 0.4 N/mm and less than 1.0 N/mm, the spring constant of a third spring of the springs corresponding to a third target part of the target parts of an area on and near a lower jawbone of the user is greater than or equal to 0.2 N/mm and less than 0.4 N/mm, and the spring constant of a fourth spring of the springs corresponding to a fourth target part of the target parts between the lower jawbone and the upper jawbone of the user is less that 0.2 N/mm.