An anti-vibration device , comprising: a cylindrical outer attachment member connected to one of a vibration generation portion and a vibration reception portion, and an inner attachment member connected to the other thereof and disposed inside of the outer attachment member ; a pair of first main rubbers which connect the outer attachment member and the inner attachment member and are disposed at an interval in an axial direction along a central axis (O) of the outer attachment member ; a partition member which divides a liquid chamber between the pair of first main rubbers into a first liquid chamber and a second liquid chamber in the axial direction; and a second main rubber which divides the first liquid chamber into a third liquid chamber using the first main rubber as a part of a partition wall, and a fourth liquid chamber using the partition member as a part of the partition wall, wherein any two liquid chambers of the second liquid chamber , the third liquid chamber , and the fourth liquid chamber communicate with each other through a first restricted passage formed in the outer attachment member , the inner attachment member or the partition member , and a remaining one liquid chamber communicates with a fifth liquid chamber formed in the outer attachment member , the inner attachment member or the partition member , and the remaining one liquid chamber is divided into liquid chambers in a circumferential direction around the central axis (O), and each of the liquid chambers divided in the circumferential direction and the fifth liquid chamber communicate with each other through a second restricted passage formed in the outer attachment member , the inner attachment member or the partition member , characterized in that the anti-vibration device further comprises a diaphragm which forms a part of a partition wall of the fifth liquid chamber . a cylindrical outer attachment member connected to one of a vibration generation portion and a vibration reception portion, and an inner attachment member connected to the other thereof and disposed inside of the outer attachment member ; a pair of first main rubbers which connect the outer attachment member and the inner attachment member and are disposed at an interval in an axial direction along a central axis (O) of the outer attachment member ; a partition member which divides a liquid chamber between the pair of first main rubbers into a first liquid chamber and a second liquid chamber in the axial direction; and a second main rubber which divides the first liquid chamber into a third liquid chamber using the first main rubber as a part of a partition wall, and a fourth liquid chamber using the partition member as a part of the partition wall, wherein any two liquid chambers of the second liquid chamber , the third liquid chamber , and the fourth liquid chamber communicate with each other through a first restricted passage formed in the outer attachment member , the inner attachment member or the partition member , and a remaining one liquid chamber communicates with a fifth liquid chamber formed in the outer attachment member , the inner attachment member or the partition member , and the remaining one liquid chamber is divided into liquid chambers in a circumferential direction around the central axis (O), and each of the liquid chambers divided in the circumferential direction and the fifth liquid chamber communicate with each other through a second restricted passage formed in the outer attachment member , the inner attachment member or the partition member , characterized in that the anti-vibration device further comprises a diaphragm which forms a part of a partition wall of the fifth liquid chamber . <EOS>