A liquid vessel for holding a liquid, comprising: at least a first member, a second member and a third member; and a first engageable portion and a second engageable portion being configured such that the first member and the second member are brought into contact with each other to be engaged, and a third engageable portion being configured such that the third member is brought into contact with the first member and the second member in a direction intersecting an engagement direction of the first member and the second member to be engaged with the first member and the second member; wherein the liquid vessel includes a wall portion, the wall portion having an inner side defined by at least the third member, the wall portion extending in a depth direction of the liquid vessel from a bottom portion of the liquid vessel and a periphery of the bottom portion; characterised in that: the first engageable portion and the second engageable portion ensure a degree of freedom in the engagement direction of the first and second engageable portions, the third engageable portion ensures a degree of freedom in the engagement direction intersecting to the engagement direction of the first and second engageable portions, the first engageable portion includes a first narrow space (S1, S2), which has a gap formed in the engagement direction of the first member and the second member and in the depth direction of the liquid vessel; the second engageable portion includes a second narrow space (S3, S4), which has a gap formed in the engagement direction of the first member and the second member and in the direction along a bottom surface of the liquid vessel; the third engageable portion includes a third narrow space (S5, S6), which has a gap formed in a direction intersecting the engagement direction of the first member and the second member and in the depth direction of the liquid vessel; the second narrow space (S3, S4) is interposed between the first narrow space (S1, S2) and the third narrow space (S5, S6), and the first narrow space (S1, S2) and the third narrow space (S5, S6) are continuous to each other through the second narrow space (S3, S4). at least a first member, a second member and a third member; and a first engageable portion and a second engageable portion being configured such that the first member and the second member are brought into contact with each other to be engaged, and a third engageable portion being configured such that the third member is brought into contact with the first member and the second member in a direction intersecting an engagement direction of the first member and the second member to be engaged with the first member and the second member; wherein the liquid vessel includes a wall portion, the wall portion having an inner side defined by at least the third member, the wall portion extending in a depth direction of the liquid vessel from a bottom portion of the liquid vessel and a periphery of the bottom portion; characterised in that: the first engageable portion and the second engageable portion ensure a degree of freedom in the engagement direction of the first and second engageable portions, the third engageable portion ensures a degree of freedom in the engagement direction intersecting to the engagement direction of the first and second engageable portions, the first engageable portion includes a first narrow space (S1, S2), which has a gap formed in the engagement direction of the first member and the second member and in the depth direction of the liquid vessel; the second engageable portion includes a second narrow space (S3, S4), which has a gap formed in the engagement direction of the first member and the second member and in the direction along a bottom surface of the liquid vessel; the third engageable portion includes a third narrow space (S5, S6), which has a gap formed in a direction intersecting the engagement direction of the first member and the second member and in the depth direction of the liquid vessel; the second narrow space (S3, S4) is interposed between the first narrow space (S1, S2) and the third narrow space (S5, S6), and the first narrow space (S1, S2) and the third narrow space (S5, S6) are continuous to each other through the second narrow space (S3, S4). the first engageable portion and the second engageable portion ensure a degree of freedom in the engagement direction of the first and second engageable portions, the third engageable portion ensures a degree of freedom in the engagement direction intersecting to the engagement direction of the first and second engageable portions, the first engageable portion includes a first narrow space (S1, S2), which has a gap formed in the engagement direction of the first member and the second member and in the depth direction of the liquid vessel; the second engageable portion includes a second narrow space (S3, S4), which has a gap formed in the engagement direction of the first member and the second member and in the direction along a bottom surface of the liquid vessel; the third engageable portion includes a third narrow space (S5, S6), which has a gap formed in a direction intersecting the engagement direction of the first member and the second member and in the depth direction of the liquid vessel; the second narrow space (S3, S4) is interposed between the first narrow space (S1, S2) and the third narrow space (S5, S6), and the first narrow space (S1, S2) and the third narrow space (S5, S6) are continuous to each other through the second narrow space (S3, S4).