NOVELTY - A secondary battery comprises cathode (11) and an anode (12) opposed to each other with a separator in between, an electrolyte layer provided between the anode and the separator, and an adhesion layer (21) provided between the anode and the electrolyte layer, where the anode includes an active material and first polymer compound, where the electrolyte layer includes an electrolytic solution and second polymer compound, where the adhesion layer includes a third polymer compound.    USE - As secondary battery, e.g. lithium ion secondary battery, used in battery pack and electric vehicle (claimed).    ADVANTAGE - The adhesion layer is provided between the anode and the electrolyte layer, and the third polymer compound of the adhesion layer includes the polar group as the first polymer compound of the anode does, and includes the same polymer chain as the polymer chain of the second polymer compound of the electrolyte layer. Thus, suppression of expansion and shrinkage of the active material and improvement of adhesibility of the anode with respect to the separator are allowed to be achieved at the same time.    DETAILED DESCRIPTION - A secondary battery comprises cathode (11) and an anode (12) opposed to each other with a separator in between, an electrolyte layer provided between the anode and the separator, and an adhesion layer (21) provided between the anode and the electrolyte layer, where the anode includes an active material and first polymer compound, where the electrolyte layer includes an electrolytic solution and second polymer compound, where the adhesion layer includes a third polymer compound, where the first polymer compound includes a polar group, the second polymer compound includes a polymer chain, and the third polymer compound includes a polar group and a polymer chain same as the polymer chain of the second polymer compound. INDEPENDENT CLAIMS are included for the following:    (1) battery pack comprising secondary battery, control section controlling a used state of the secondary battery, and a switch section switching the used state of secondary battery according to an instruction of the control section, where the secondary battery includes a cathode and an anode opposed to each other with a separator in between, an electrolyte layer provided between the anode and the separator, and an adhesion layer provided between the anode and the electrolyte layer, where the anode includes an active material and first polymer compound, where the electrolyte layer includes an electrolytic solution and a second polymer compound, where the adhesion layer includes a third polymer compound, the first polymer compound includes a polar group, where second polymer compound includes a polymer chain, and the third polymer compound includes a polar group and a polymer chain same as the polymer chain of the second polymer compound; and    (2) electric vehicle comprising secondary battery, conversion section converting electric power supplied from the secondary battery into drive power, drive section operating according to the drive power, and a control section controlling a used state of the secondary battery, where the secondary battery includes a cathode and an anode opposed to each other with a separator in between, an electrolyte layer provided between the anode and the separator, and an adhesion layer provided between the anode and the electrolyte layer, where the anode includes an active material and a first polymer compound, the electrolyte layer includes an electrolytic solution and a second polymer compound, the adhesion layer includes a third polymer compound, the first polymer compound includes a polar group, the second polymer compound includes a polymer chain, and the third polymer compound includes a polar group and a polymer chain same as the polymer chain of the second polymer compound.    DESCRIPTION OF DRAWING(S) - The figure shows perspective view of secondary battery.    Spirally wound electrode body (10)    Cathode (11)    Anode (12)    Outer package member (20)    Adhesion layer (21)